阐述了采煤过程中底板岩层在矿压作用下的变形特征及其规律。
This paper describes characteristics and regularity of deformation of floor rocks under ground pressure.
黄厚纸板、红硬纸板、PVC板、白卡纸、鸡皮纸、纤维中底板以及塑胶板等。
Yellow thick paper board, red hard paper board, PVC board, ivory cardboard, sulphite paper, insole fiberboard and plastic board, etc.
当海洋底部开始下沉到地幔中，它会同时将整个海底板块拖拽下去。
As the ocean floor plate begins to sink down into the mantle, it would drag or pull the entire plate along with it.
应用推荐