A.網(wǎng)面長、寬及網(wǎng)面長短差B.鋼絲直徑及網(wǎng)面平整度C.絲梗厚度、寬度及短節(jié)矩D.網(wǎng)面長、寬及網(wǎng)格尺寸
A.20NB.24NC.25ND.28N
A.甲苯、二甲苯B.松節(jié)油、煤油C.甲醇D.乙醇