I ,. 14.1%, 57.3%, 42.7% (. 1993)., ,.,... 1.,

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2 I ,. 14.1%, 57.3%, 42.7% (. 1993)., ,.,... 1.,

3 ..,,., 1,,, ( ), ,.,. (descriptive statistics), (network analysis) (path distance) (multidimensional scaling), Krackplot (graph analysis) ,,,.,,,. 112,,,,,. 1,000 52% % %

4 T able 1. Regional and scale distribution of respondents Region Scale Region and scale Cases Percent(% ) Pusan Inchon T aejon Kw angju T aeku Ulsan Kyongki Chungnam Chungbuk Jonnam Jonbuk Kyoungnam Kyoungbuk T otal ,000 T otal T able 2. Industrial classification distribution of respondents Industrial classification Cases Percent(%) Manufacture of textile Manufacture of w ood and of products of w ood and cork, except furniture; manufacture of articles of straw and plaiting materials Manufacture of pulp, paper and paper products Manufacture of chemicals and chemical products Manufacture of rubber and plastics products Manufacture of other non- metallic mineral products Manufacture of basic metals Manufacture of fabricated metal products, except machinery and equipment Manufacture of machinery and equipment n.e.c Manufacture of office, accounting and computing machinery Manufacture of electrical machinery and apparatus n.e.c Manufacture of radio, television and communication equipment and apparatus Manufacture of medical, precision and optical instruments, watches and clocks Manufacture of motor vehicles, trailers and semi- trailers Manufacture of other transport equipment Manufacture of furniture; manufacturing n.e.c Electricity, gas, s team and hot w ater s upply W ater transport T otal

5 21.8%, %,, 10.0% %, % %, 90 31%.., 68%, 69%( 67%). T able 3. Distributions of local exhaust system and operation year No. of facilities Cases Percent(% ) Operation year Cas es Percent(%) < Sixties Seventies First half of eighties Second half of eighties F irst half of nineties Second half of nineties T otal T otal %( 91%) 77%( 72%) 99 39%, 98 49%. 3.,,,, (ACGIH, 1998). ( 76.1%), 72.1%,, ( 39.5%). T able 4. Dissatisfaction of elements of local exhaust system Elements Diss atisfaction rate(%)* Hood 70.9 Duct system 76.1 Fan 62.1 Exhaust stack 39.5 Air cleaning device 72.1 * Percent of 112 respondents, 18.6%, - 5 -

6 18.3% 13.3%, 12.8% % 15.1% 10.6% 52.8%....,,, %, T able 5. Dissatisfaction of elements of local exhaust system Hood Duct sys tem Dis satis faction Cases Percent (%) Diss atisfaction Cases Percent (%) Shape Dimension Dimension Shape Performance Corros ion, deformation Location Leakage Corros ion Static press ure opening Deformation Noise Noise Damper No. of hoods Accumulation in duct Others Cleaning duct T otal Cleaning hole Others T otal Fan Exhaust stack Diss atisfaction Cases Percent (%) Dissatisfaction Cas es Percent (%) Lack of capacity Corros ion Corros ion Noise Noise Air intake contamination Motors Deformation Belts Others Pulley T otal Improper RPM Bearings Impeller Safety cover Others T otal

7 T able 6. Dissatisfaction of air cleaning devices Items Scrubber Adsorption tow er Bag filter Cyclone Electrostatic preciptator Combustors or Oxidizers Cases Percent(%) Cases Percent(%) Cas es Percent(%) Cas es Percent(%) Cases Percent(%) Cas es Percent(%) T ype Lack of ca pacity Corros ion N oise Increas ing P res sure loss T roubles Connectors Window s Low efficiency Operation cost Others T otal %, 12.1%, 10.7%, 7.4% %, %., ( ) ( ),,,,..,,,,,,,,,,,.. 4., 53.3% % %

8 T able 7. T ype of Information suppliers T ype Cases Percent (%) Ministry of Labor Korea Occupational Safety & Health Agency Anti- pollution equipm ent businesses Galvanized sheet w orks Consultants F actories of same kind F actories of different kind Others T otal % %,,. 44.2%, 35.7%. PC 4%,. 57.1% PC 76.8% % 26.8%, 22.2%, 21.8%. 4,,, %, ( ) 28.7%, 11.3%. 87% % 24.7%, 13.0%, 9.4%

9 . 50% 23.4%, 15.6% 89.0%. 32.2%, 12.8%,,,,. 50%, 23.4%, 15.6% 89.0%,.. T able 8. Contact frequency per year and contact methods Items Cases Percent (% ) Contact frequency per year T otal Contact methods Phone FAX Visit Post PC comm unication Internet Others T otal T able 9. Results of information search concerning elements of local exhaust system Elements Cases Percent (% ) Hood Duct system F an Air cleaning device T otal

10 T able 10. Detailed information of elements of local exhaust system Hood Duct s ystem Fan Air cleaning device Information Cases Percent Percent Percent Percent Information Cases Information Cases Information Cases (%) (%) (%) (%) T ype & Shape Diameter Capacity T ype Flow rate required* Material** T ype Efficiency Dimension Head los s Material*** Material Material Accumulati on in duct, W /A Cost clogging Location Length, s hape Efficiency Capacity Des ign Waste Cleaning Pow er method treatment T otal Damper Impeller Safety T otal T otal T otal * Flow rate required and control velocity ** Including material, anti- acid, anti- corrosion, and manufacturing according to material *** Including anti- explosion, anti- acid, anti- corrosion Wheel alignment T o remove dust on impeller 46.9%, 14.7%.,. 39.9%, 9.8%. 38.5%, 50.4%..,,, 62%, 25%, 40%, (,,, ) 32%, 11%, 57%, 14%, 16%, 57%, 17%

12 T able 12. Distribution of path of information informants, its relationship, and period of contact Item s Cas es Percent (% ) Informants Ministry of Labor Korea Occupation S afety & Health Agency Friends or alum ni Factories of s ame kind Factories of different kind Advertisement Others T otal Relationship Business Alumni Others T otal Contact period < 1 year years T otal ,.,.,,,.,,..,,, , 2.,,,.,

13 .,, 5.,.,,.,., 3. 3.,..,... Fig 1. Information network for local exhaust system design

15 ,.,..,,.,, 4. 4,,,.,,...,, 5.,. Fig 4. Information network for local exhaust system

16 .,.,,, , Krackplot. 1) 68%, 67%, 91%. 2),,,,,,,. 3), 1. 4) 3/4,,, FAX PC. 5). 6). 7),.. 8). 9),.,

17 ., RE FE RE NCE S.. ; 1993 American Conference of Industrial Hygienists. Industrial ventilation a manual of recommended practice. 23rd ed. Cincinnat: ACGIH; 1998, p

02 Reihe bis 750 bar GB-9.03

02 Reihe bis 750 bar GB-9.03 Water as a tool High-Pressure Plunger Pumps 02-Line (up to 750 bar) 252 702 1002 1502 1852 2502 Technical Data High-Pressure Plunger Pump Type 252 / 702 approx. 1.8 l approx. 50 kg net 45 mm/1.77 inch