單項(xiàng)選擇題
粉末細(xì)度要求通過200目篩網(wǎng)時(shí)的篩余量<()
A.1%
B.2%
C.3%
D.4%
粉末細(xì)度要求通過200目篩網(wǎng)時(shí)的篩余量<()
A.1%
B.2%
C.3%
D.4%