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4、 2007 4 , . b) , . , . 7 . a) 2 (201) g . 6. a) (201) g . , 6. a) . . 1 . 2 . b) 1 1) . 1 1). c) , . . , . 8 . a) 2 “ ”, “ ” . b) 2 7. a)c) “ ” , “ ” . c) . 9 . 135513 7017 (02)60094114 (02)600948878 http:/ KS M 2022: 2007KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Testing method for thermal stability of lubricating oils ICS 75.100 Korean Agency for Technology and Standards http:/www.kats.go.kr