A.直徑≦10mm個數(shù)不限 B.直徑≦15mm個數(shù)不限 C.直徑≦20mm個數(shù)不限 D.直徑≦25mm個數(shù)不限
A.13.4% B.16.5% C.19.8% D.15.0%
A.0~0.4mm B.1~0.4mm C.2~0.5mm D.3~0.4mm