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1 車床橫滑台進刀桿之螺距4mm,刻度環之刻度為200格,若工件直徑為30mm,橫滑台進刀再進18格,則其直徑變為多少?
A 29.6mm
B 29.28mm
C 29.55mm
D 29.10mm
刻度環之刻度一格為4/200=0.02mm,進18格,半徑量會減18´0.02=0.36mm,直徑便減少0.72mm,故直徑變為30-0.72 = 29.28mm