Powered roofsupports are used to support the roof at the face.
液压支架被用来支护工作面顶板。
2
TH, V RoofSupports, GI Supports, Monroail Profiles are produced for Mining purposes.
用于采矿的TH 产品，V型顶板支架，GI支架以及单轨道型材均在此生产。
3
Marks in the wall indicate wooden roofsupports were used to create the tomb, but the wood long ago collapsed under the weight of the pyramid built above.