2.0mm A.110g/㎡B.230g/㎡C.290g/㎡D.350g/㎡
2.0mm<φ≤2.2mm隔离栅钢丝Ⅰ级单面平均镀锌层附着量为()
A.110g/㎡
B.230g/㎡
C.290g/㎡
D.350g/㎡
相关考题:
隔离栅紧固件、连接件单面平均镀锌层附着量为350g/m2。()
A.110g/㎡
B.230g/㎡
C.290g/㎡
D.350g/㎡