①,When d≤M12, if L≤75mm,then b=L-K1; if 75<L≤125mm,then b=2d+6; if 125<L≤200mm时,then b=2d+12; if L>200mm时,then b=2d+25; ②,When d>M12, if L≤125mm时,then b=2d+6; if 125<L≤200mm时,then b=2d+12; if L>200mm时,then b=2d+25; ③,Standard nominal lengths are not specified in this standard, it may however, as a result of experience of usage,be possible to include these details at a future revision. |