日本工业标准_JIS B4236-2009 Milling cutters-Counterbores for hexagon socket head bolts(Amendment 1)_?F JIS B 4236 2009V;? 41 Milling cutters-Counterbores for hexagon socket head bolts Amendment 1 JIS B 4236:1998 ?|w?OtYb? 2.;Fw JIS B 0601
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