Shingles are often dipped in creosote.
屋
板常浸涂木焦油。
Shingles are often dipped in creosote.
屋板常浸涂木焦油。
Through Analysis on roadway roof separation time and law,Adoption malison reinforcing roadway roof separation Exceed the range area,Make the obvious result.
通过
巷道板离层时间及规律进行分析,
用马丽
板离层超范围区进行加固,取得明显效果。
There is a coal layer on the clay of direct roof.This layers is unstable and easy tofall down after mining and enable the gas to gush out.
团
锰矿的直接板粘土之上有一煤层，且不稳
，
容易垮落，造成瓦斯涌出。
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