Overview

Dataset statistics

Number of variables9
Number of observations80
Missing cells11
Missing cells (%)1.5%
Duplicate rows0
Duplicate rows (%)0.0%
Total size in memory5.8 KiB
Average record size in memory73.7 B

Variable types

Categorical4
Text3
DateTime2

Dataset

Description한전원자력연료(KNF)의 계약체결 현황으로 계약명, 계약번호, 개찰일, 계약체결일 등의 항목을 제공합니다.
Author한전원자력연료(주)
URLhttps://www.data.go.kr/data/3069970/fileData.do

Alerts

회사명 has constant value ""Constant
사업소 has constant value ""Constant
업무구분 is highly overall correlated with 계약방법High correlation
계약방법 is highly overall correlated with 업무구분High correlation
개찰일 has 11 (13.8%) missing valuesMissing
계약번호 has unique valuesUnique
계약명 has unique valuesUnique

Reproduction

Analysis started2024-04-29 23:22:55.064727
Analysis finished2024-04-29 23:22:57.355923
Duration2.29 seconds
Software versionydata-profiling vv4.5.1
Download configurationconfig.json

Variables

회사명
Categorical

CONSTANT 

Distinct1
Distinct (%)1.2%
Missing0
Missing (%)0.0%
Memory size772.0 B
한전원자력연료(주)
80 

Length

Max length10
Median length10
Mean length10
Min length10

Unique

Unique0 ?
Unique (%)0.0%

Sample

1st row한전원자력연료(주)
2nd row한전원자력연료(주)
3rd row한전원자력연료(주)
4th row한전원자력연료(주)
5th row한전원자력연료(주)

Common Values

ValueCountFrequency (%)
한전원자력연료(주) 80
100.0%

Length

2024-04-30T08:22:57.411915image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
Histogram of lengths of the category

Common Values (Plot)

2024-04-30T08:22:57.505322image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
ValueCountFrequency (%)
한전원자력연료(주 80
100.0%

사업소
Categorical

CONSTANT 

Distinct1
Distinct (%)1.2%
Missing0
Missing (%)0.0%
Memory size772.0 B
경영관리본부
80 

Length

Max length6
Median length6
Mean length6
Min length6

Unique

Unique0 ?
Unique (%)0.0%

Sample

1st row경영관리본부
2nd row경영관리본부
3rd row경영관리본부
4th row경영관리본부
5th row경영관리본부

Common Values

ValueCountFrequency (%)
경영관리본부 80
100.0%

Length

2024-04-30T08:22:57.599995image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
Histogram of lengths of the category

Common Values (Plot)

2024-04-30T08:22:57.688506image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
ValueCountFrequency (%)
경영관리본부 80
100.0%

업무구분
Categorical

HIGH CORRELATION 

Distinct3
Distinct (%)3.8%
Missing0
Missing (%)0.0%
Memory size772.0 B
자재
41 
용역
36 
공사
 
3

Length

Max length2
Median length2
Mean length2
Min length2

Unique

Unique0 ?
Unique (%)0.0%

Sample

1st row자재
2nd row자재
3rd row자재
4th row용역
5th row자재

Common Values

ValueCountFrequency (%)
자재 41
51.2%
용역 36
45.0%
공사 3
 
3.8%

Length

2024-04-30T08:22:57.784640image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
Histogram of lengths of the category

Common Values (Plot)

2024-04-30T08:22:57.881901image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
ValueCountFrequency (%)
자재 41
51.2%
용역 36
45.0%
공사 3
 
3.8%

계약번호
Text

UNIQUE 

Distinct80
Distinct (%)100.0%
Missing0
Missing (%)0.0%
Memory size772.0 B
2024-04-30T08:22:58.109104image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/

Length

Max length11
Median length10
Mean length10.4875
Min length10

Characters and Unicode

Total characters839
Distinct characters12
Distinct categories2 ?
Distinct scripts2 ?
Distinct blocks1 ?
The Unicode Standard assigns character properties to each code point, which can be used to analyse textual variables.

Unique

Unique80 ?
Unique (%)100.0%

Sample

1st rowR122400041
2nd rowR122400040
3rd rowR122400038
4th rowC0122420039
5th rowR122400039
ValueCountFrequency (%)
r122400041 1
 
1.2%
r122400040 1
 
1.2%
c0122420016 1
 
1.2%
c0122420014 1
 
1.2%
c0122420015 1
 
1.2%
r122400010 1
 
1.2%
r122400011 1
 
1.2%
r122400012 1
 
1.2%
r122400008 1
 
1.2%
r122400009 1
 
1.2%
Other values (70) 70
87.5%
2024-04-30T08:22:58.469017image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/

Most occurring characters

ValueCountFrequency (%)
0 265
31.6%
2 224
26.7%
1 112
13.3%
4 90
 
10.7%
R 41
 
4.9%
C 39
 
4.6%
3 28
 
3.3%
8 8
 
1.0%
9 8
 
1.0%
6 8
 
1.0%
Other values (2) 16
 
1.9%

Most occurring categories

ValueCountFrequency (%)
Decimal Number 759
90.5%
Uppercase Letter 80
 
9.5%

Most frequent character per category

Decimal Number
ValueCountFrequency (%)
0 265
34.9%
2 224
29.5%
1 112
14.8%
4 90
 
11.9%
3 28
 
3.7%
8 8
 
1.1%
9 8
 
1.1%
6 8
 
1.1%
7 8
 
1.1%
5 8
 
1.1%
Uppercase Letter
ValueCountFrequency (%)
R 41
51.2%
C 39
48.8%

Most occurring scripts

ValueCountFrequency (%)
Common 759
90.5%
Latin 80
 
9.5%

Most frequent character per script

Common
ValueCountFrequency (%)
0 265
34.9%
2 224
29.5%
1 112
14.8%
4 90
 
11.9%
3 28
 
3.7%
8 8
 
1.1%
9 8
 
1.1%
6 8
 
1.1%
7 8
 
1.1%
5 8
 
1.1%
Latin
ValueCountFrequency (%)
R 41
51.2%
C 39
48.8%

Most occurring blocks

ValueCountFrequency (%)
ASCII 839
100.0%

Most frequent character per block

ASCII
ValueCountFrequency (%)
0 265
31.6%
2 224
26.7%
1 112
13.3%
4 90
 
10.7%
R 41
 
4.9%
C 39
 
4.6%
3 28
 
3.3%
8 8
 
1.0%
9 8
 
1.0%
6 8
 
1.0%
Other values (2) 16
 
1.9%

계약명
Text

UNIQUE 

Distinct80
Distinct (%)100.0%
Missing0
Missing (%)0.0%
Memory size772.0 B
2024-04-30T08:22:58.723477image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/

Length

Max length61
Median length38
Mean length25.9125
Min length8

Characters and Unicode

Total characters2073
Distinct characters298
Distinct categories11 ?
Distinct scripts3 ?
Distinct blocks3 ?
The Unicode Standard assigns character properties to each code point, which can be used to analyse textual variables.

Unique

Unique80 ?
Unique (%)100.0%

Sample

1st rowECO동 냉온수코일 구매
2nd rowTSA플랜트 가공공정 장비용 HMI 구매
3rd row혁신형 SMR 제어봉집합체 시제품 및 부품 제작 구매
4th row2024년 임원배상책임보험 가입 용역
5th rowPD박스 팔레트 운송용 전동지게차 구매
ValueCountFrequency (%)
구매 31
 
7.2%
용역 23
 
5.3%
및 15
 
3.5%
2024년도 9
 
2.1%
제작 8
 
1.8%
외 7
 
1.6%
단가계약 6
 
1.4%
tsa플랜트 6
 
1.4%
구매(저장품 5
 
1.2%
단가계약(2024년 4
 
0.9%
Other values (260) 319
73.7%
2024-04-30T08:22:59.151142image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/

Most occurring characters

ValueCountFrequency (%)
353
 
17.0%
2 72
 
3.5%
용 54
 
2.6%
구 42
 
2.0%
매 39
 
1.9%
역 37
 
1.8%
0 35
 
1.7%
) 30
 
1.4%
( 30
 
1.4%
4 30
 
1.4%
Other values (288) 1351
65.2%

Most occurring categories

ValueCountFrequency (%)
Other Letter 1327
64.0%
Space Separator 353
 
17.0%
Decimal Number 167
 
8.1%
Uppercase Letter 113
 
5.5%
Lowercase Letter 34
 
1.6%
Close Punctuation 30
 
1.4%
Open Punctuation 30
 
1.4%
Dash Punctuation 6
 
0.3%
Other Punctuation 6
 
0.3%
Connector Punctuation 4
 
0.2%

Most frequent character per category

Other Letter
ValueCountFrequency (%)
용 54
 
4.1%
구 42
 
3.2%
매 39
 
2.9%
역 37
 
2.8%
수 26
 
2.0%
기 25
 
1.9%
가 25
 
1.9%
공 23
 
1.7%
년 21
 
1.6%
계 21
 
1.6%
Other values (233) 1014
76.4%
Uppercase Letter
ValueCountFrequency (%)
S 24
21.2%
A 19
16.8%
T 16
14.2%
E 8
 
7.1%
N 7
 
6.2%
O 6
 
5.3%
R 5
 
4.4%
F 4
 
3.5%
C 4
 
3.5%
M 3
 
2.7%
Other values (10) 17
15.0%
Lowercase Letter
ValueCountFrequency (%)
e 5
14.7%
d 4
11.8%
r 3
8.8%
t 3
8.8%
s 3
8.8%
l 3
8.8%
n 2
 
5.9%
i 2
 
5.9%
y 2
 
5.9%
b 1
 
2.9%
Other values (6) 6
17.6%
Decimal Number
ValueCountFrequency (%)
2 72
43.1%
0 35
21.0%
4 30
18.0%
1 9
 
5.4%
5 7
 
4.2%
3 6
 
3.6%
7 3
 
1.8%
6 3
 
1.8%
8 1
 
0.6%
9 1
 
0.6%
Other Punctuation
ValueCountFrequency (%)
/ 4
66.7%
# 1
 
16.7%
· 1
 
16.7%
Space Separator
ValueCountFrequency (%)
353
100.0%
Close Punctuation
ValueCountFrequency (%)
) 30
100.0%
Open Punctuation
ValueCountFrequency (%)
( 30
100.0%
Dash Punctuation
ValueCountFrequency (%)
- 6
100.0%
Connector Punctuation
ValueCountFrequency (%)
_ 4
100.0%
Math Symbol
ValueCountFrequency (%)
~ 3
100.0%

Most occurring scripts

ValueCountFrequency (%)
Hangul 1327
64.0%
Common 599
28.9%
Latin 147
 
7.1%

Most frequent character per script

Hangul
ValueCountFrequency (%)
용 54
 
4.1%
구 42
 
3.2%
매 39
 
2.9%
역 37
 
2.8%
수 26
 
2.0%
기 25
 
1.9%
가 25
 
1.9%
공 23
 
1.7%
년 21
 
1.6%
계 21
 
1.6%
Other values (233) 1014
76.4%
Latin
ValueCountFrequency (%)
S 24
16.3%
A 19
 
12.9%
T 16
 
10.9%
E 8
 
5.4%
N 7
 
4.8%
O 6
 
4.1%
R 5
 
3.4%
e 5
 
3.4%
d 4
 
2.7%
F 4
 
2.7%
Other values (26) 49
33.3%
Common
ValueCountFrequency (%)
353
58.9%
2 72
 
12.0%
0 35
 
5.8%
) 30
 
5.0%
( 30
 
5.0%
4 30
 
5.0%
1 9
 
1.5%
5 7
 
1.2%
- 6
 
1.0%
3 6
 
1.0%
Other values (9) 21
 
3.5%

Most occurring blocks

ValueCountFrequency (%)
Hangul 1327
64.0%
ASCII 745
35.9%
None 1
 
< 0.1%

Most frequent character per block

ASCII
ValueCountFrequency (%)
353
47.4%
2 72
 
9.7%
0 35
 
4.7%
) 30
 
4.0%
( 30
 
4.0%
4 30
 
4.0%
S 24
 
3.2%
A 19
 
2.6%
T 16
 
2.1%
1 9
 
1.2%
Other values (44) 127
 
17.0%
Hangul
ValueCountFrequency (%)
용 54
 
4.1%
구 42
 
3.2%
매 39
 
2.9%
역 37
 
2.8%
수 26
 
2.0%
기 25
 
1.9%
가 25
 
1.9%
공 23
 
1.7%
년 21
 
1.6%
계 21
 
1.6%
Other values (233) 1014
76.4%
None
ValueCountFrequency (%)
· 1
100.0%

개찰일
Date

MISSING 

Distinct42
Distinct (%)60.9%
Missing11
Missing (%)13.8%
Memory size772.0 B
Minimum2023-12-20 00:00:00
Maximum2024-03-27 00:00:00
2024-04-30T08:22:59.281032image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
2024-04-30T08:22:59.395317image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
Histogram with fixed size bins (bins=42)

계약체결일
Date

Distinct42
Distinct (%)52.5%
Missing0
Missing (%)0.0%
Memory size772.0 B
Minimum2024-01-02 00:00:00
Maximum2024-03-29 00:00:00
2024-04-30T08:22:59.507133image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
2024-04-30T08:22:59.640277image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
Histogram with fixed size bins (bins=42)

계약방법
Categorical

HIGH CORRELATION 

Distinct5
Distinct (%)6.2%
Missing0
Missing (%)0.0%
Memory size772.0 B
수의계약
25 
제한경쟁
18 
일반경쟁
17 
수의(온라인)
11 
제한경쟁(중소기업간)
9 

Length

Max length11
Median length4
Mean length5.2
Min length4

Unique

Unique0 ?
Unique (%)0.0%

Sample

1st row수의계약
2nd row수의계약
3rd row일반경쟁
4th row일반경쟁
5th row제한경쟁

Common Values

ValueCountFrequency (%)
수의계약 25
31.2%
제한경쟁 18
22.5%
일반경쟁 17
21.2%
수의(온라인) 11
13.8%
제한경쟁(중소기업간) 9
 
11.2%

Length

2024-04-30T08:22:59.775288image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
Histogram of lengths of the category

Common Values (Plot)

2024-04-30T08:22:59.893765image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
ValueCountFrequency (%)
수의계약 25
31.2%
제한경쟁 18
22.5%
일반경쟁 17
21.2%
수의(온라인 11
13.8%
제한경쟁(중소기업간 9
 
11.2%

계약업체명
Text

Distinct74
Distinct (%)92.5%
Missing0
Missing (%)0.0%
Memory size772.0 B
2024-04-30T08:23:00.111969image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/

Length

Max length21
Median length14
Mean length9.1125
Min length3

Characters and Unicode

Total characters729
Distinct characters178
Distinct categories7 ?
Distinct scripts3 ?
Distinct blocks2 ?
The Unicode Standard assigns character properties to each code point, which can be used to analyse textual variables.

Unique

Unique68 ?
Unique (%)85.0%

Sample

1st row청남공조 주식회사
2nd row사민솔루션
3rd row주식회사 풍산에프앤에스
4th row롯데손해보험(주)
5th row지엔씨홀딩스
ValueCountFrequency (%)
주식회사 29
25.2%
써모피셔사이언티픽코리아 2
 
1.7%
엘에스아이정보기술 2
 
1.7%
글로벌텍주식회사 2
 
1.7%
에네스지 2
 
1.7%
영진정밀 2
 
1.7%
풍산에프앤에스 2
 
1.7%
유한회사 2
 
1.7%
한결산업 1
 
0.9%
주)한국건설안전공사 1
 
0.9%
Other values (70) 70
60.9%
2024-04-30T08:23:00.483372image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/

Most occurring characters

ValueCountFrequency (%)
주 47
 
6.4%
사 46
 
6.3%
회 41
 
5.6%
35
 
4.8%
식 34
 
4.7%
이 24
 
3.3%
스 20
 
2.7%
( 17
 
2.3%
에 17
 
2.3%
) 17
 
2.3%
Other values (168) 431
59.1%

Most occurring categories

ValueCountFrequency (%)
Other Letter 655
89.8%
Space Separator 35
 
4.8%
Open Punctuation 17
 
2.3%
Close Punctuation 17
 
2.3%
Lowercase Letter 3
 
0.4%
Dash Punctuation 1
 
0.1%
Uppercase Letter 1
 
0.1%

Most frequent character per category

Other Letter
ValueCountFrequency (%)
주 47
 
7.2%
사 46
 
7.0%
회 41
 
6.3%
식 34
 
5.2%
이 24
 
3.7%
스 20
 
3.1%
에 17
 
2.6%
아 15
 
2.3%
지 14
 
2.1%
한 12
 
1.8%
Other values (160) 385
58.8%
Lowercase Letter
ValueCountFrequency (%)
e 1
33.3%
n 1
33.3%
o 1
33.3%
Space Separator
ValueCountFrequency (%)
35
100.0%
Open Punctuation
ValueCountFrequency (%)
( 17
100.0%
Close Punctuation
ValueCountFrequency (%)
) 17
100.0%
Dash Punctuation
ValueCountFrequency (%)
- 1
100.0%
Uppercase Letter
ValueCountFrequency (%)
V 1
100.0%

Most occurring scripts

ValueCountFrequency (%)
Hangul 655
89.8%
Common 70
 
9.6%
Latin 4
 
0.5%

Most frequent character per script

Hangul
ValueCountFrequency (%)
주 47
 
7.2%
사 46
 
7.0%
회 41
 
6.3%
식 34
 
5.2%
이 24
 
3.7%
스 20
 
3.1%
에 17
 
2.6%
아 15
 
2.3%
지 14
 
2.1%
한 12
 
1.8%
Other values (160) 385
58.8%
Common
ValueCountFrequency (%)
35
50.0%
( 17
24.3%
) 17
24.3%
- 1
 
1.4%
Latin
ValueCountFrequency (%)
e 1
25.0%
n 1
25.0%
o 1
25.0%
V 1
25.0%

Most occurring blocks

ValueCountFrequency (%)
Hangul 655
89.8%
ASCII 74
 
10.2%

Most frequent character per block

Hangul
ValueCountFrequency (%)
주 47
 
7.2%
사 46
 
7.0%
회 41
 
6.3%
식 34
 
5.2%
이 24
 
3.7%
스 20
 
3.1%
에 17
 
2.6%
아 15
 
2.3%
지 14
 
2.1%
한 12
 
1.8%
Other values (160) 385
58.8%
ASCII
ValueCountFrequency (%)
35
47.3%
( 17
23.0%
) 17
23.0%
e 1
 
1.4%
n 1
 
1.4%
o 1
 
1.4%
- 1
 
1.4%
V 1
 
1.4%

Correlations

2024-04-30T08:23:00.578570image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
업무구분계약번호계약명개찰일계약체결일계약방법계약업체명
업무구분1.0001.0001.0000.0000.8710.6610.917
계약번호1.0001.0001.0001.0001.0001.0001.000
계약명1.0001.0001.0001.0001.0001.0001.000
개찰일0.0001.0001.0001.0000.9070.6060.000
계약체결일0.8711.0001.0000.9071.0000.6880.000
계약방법0.6611.0001.0000.6060.6881.0000.882
계약업체명0.9171.0001.0000.0000.0000.8821.000
2024-04-30T08:23:00.681672image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
업무구분계약방법
업무구분1.0000.622
계약방법0.6221.000
2024-04-30T08:23:00.753143image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
업무구분계약방법
업무구분1.0000.622
계약방법0.6221.000

Missing values

2024-04-30T08:22:57.145179image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
A simple visualization of nullity by column.
2024-04-30T08:22:57.301559image/svg+xmlMatplotlib v3.7.2, https://matplotlib.org/
Nullity matrix is a data-dense display which lets you quickly visually pick out patterns in data completion.

Sample

회사명사업소업무구분계약번호계약명개찰일계약체결일계약방법계약업체명
0한전원자력연료(주)경영관리본부자재R122400041ECO동 냉온수코일 구매2024/03/272024/03/29수의계약청남공조 주식회사
1한전원자력연료(주)경영관리본부자재R122400040TSA플랜트 가공공정 장비용 HMI 구매2024/03/262024/03/29수의계약사민솔루션
2한전원자력연료(주)경영관리본부자재R122400038혁신형 SMR 제어봉집합체 시제품 및 부품 제작 구매2024/02/272024/03/28일반경쟁주식회사 풍산에프앤에스
3한전원자력연료(주)경영관리본부용역C01224200392024년 임원배상책임보험 가입 용역2024/03/262024/03/28일반경쟁롯데손해보험(주)
4한전원자력연료(주)경영관리본부자재R122400039PD박스 팔레트 운송용 전동지게차 구매2024/03/152024/03/27제한경쟁지엔씨홀딩스
5한전원자력연료(주)경영관리본부용역C01224200342024년 튜브공장 재산종합보험 가입 용역2024/03/192024/03/27일반경쟁삼성화재해상보험 주식회사
6한전원자력연료(주)경영관리본부용역C0122420036스마트 제조 업무환경 무선 네트워크 구축2024/02/282024/03/27일반경쟁주식회사 엘지유플러스
7한전원자력연료(주)경영관리본부용역C0122420038피복관 코팅장비 유지보수 및 운영 용역<NA>2024/03/26수의(온라인)아텍시스템
8한전원자력연료(주)경영관리본부자재R122400036TSA플랜트 필거 3호기용 서보드라이브 시스템 구매2024/03/142024/03/25수의계약주식회사 보쉬렉스로스코리아
9한전원자력연료(주)경영관리본부용역C0122420037태양광 발전시설 설치 공사 설계용역2024/03/072024/03/25일반경쟁(주)동성기술감리단
회사명사업소업무구분계약번호계약명개찰일계약체결일계약방법계약업체명
70한전원자력연료(주)경영관리본부용역C0122420005외국법인 원천징수 관련 세무자문 용역 단가계약(2024년)2024/01/042024/01/11제한경쟁지안회계법인
71한전원자력연료(주)경영관리본부용역C01224200042024년도 해외연속간행물 구독 용역<NA>2024/01/11수의(온라인)주식회사 엘아이에스코리아
72한전원자력연료(주)경영관리본부공사C0122410003생산현장 노후 네트워크 교체 공사2023/12/212024/01/08제한경쟁샤인엔지니어링 주식회사
73한전원자력연료(주)경영관리본부용역C0122420001방사선계측기 교정용역 단가계약(2024)2023/12/262024/01/04제한경쟁(주)코라솔
74한전원자력연료(주)경영관리본부용역C0122420002전 직원 정기 안전보건교육 용역(2024-2025)2023/12/202024/01/04제한경쟁사단법인 세종보건안전협회
75한전원자력연료(주)경영관리본부자재R1224000052024년도 TSA/NSA 플랜트 폐수처리용 화학약품(불소제거제 외 1종) 구매 단가계약2024/01/022024/01/03수의계약으뜸환경
76한전원자력연료(주)경영관리본부자재R122400004연료생산처 중수로연료 흑연용액 구매(저장품)2024/01/022024/01/03수의계약헨켈코리아 유한회사
77한전원자력연료(주)경영관리본부자재R122400003유찰수의공고_2024년 락카제거용액 연간 단가계약2023/12/282024/01/03수의계약주식회사 교우산업
78한전원자력연료(주)경영관리본부자재R1224000022024년 UF6 저장고 소모품 구매 단가계약2023/12/272024/01/02수의계약월드상사
79한전원자력연료(주)경영관리본부자재R122400001TSA플랜트 스크류 공기압축설비 2단 압축기 구매2023/12/282024/01/02수의계약한신기계주식회사