包装可从商业和自家做的各种材料，钢材，羊毛，木屑，焦炭，砾石等气体是通过底部和顶部删除。

Packing can be made from wide range of commercial and home made materials-steel, wool, wood chips, coke, gravel etc. Gas is passed through bottom and removed at top.

youdao

包装可从商业和自家做的各种材料，钢材，羊毛，木屑，焦炭，砾石等气体是通过底部和顶部删除。

Packing can be made from wide range of commercial and home made materials-steel, wool, wood chips, coke, gravel etc. Gas is passed through bottom and removed at top.

youdao