冶金、矿山系统中的冲渣沟，矿槽，料库等内衬。

The lining of metallurgy, slag ditch of mining system, mine tanks, material warehouse and so on…

youdao

冶金、矿山系统中的冲渣沟，矿槽，料库等内衬。

The lining of metallurgy, slag ditch of mining system, mine tanks, material warehouse and so on…

youdao