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3、 255 90 2001.25 2001.4 200 4 2301.25 2301.4 230 8 2551.25 2551.4 255 3 1.250.06 1.40.15 25.4 0.15 0 12 4 , 40 8,12 , 20 a () (h) . 6 KS D 3751 STC 5 . 7 7.1 10 mm 4 4 KS B 5202 . 4 . 7.2 7.1 KS B 5526 KS B 0806 . 4 . KS B 7631:2009 4 7.3 1 10 mm KS B 5206 . . (D) 1/3 . 1 7.4 1 KS B 5206 . 8 , , , , , , 4.1 4.6 5. . 9 , . 1 KS B 7631 2301.4 2 2001.25 10 . a) (DT) b) c) , 10mm 153787 1 92 3 (13 ) (02)26240114 (02)262401489 http:/ KS B 7631 :2009 KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Bush cutter saws ICS 65.060.40 Korean Agency for Technology and Standards http:/www.kats.go.kr