Because this coal bed thickness is moderate, selects the shield type hydraulic pressure support.
由于该煤层厚度适中，选用掩护式液压支架。
But he was unable to get out of bed, even it is very difficult to support the body.
但他完全无法下床，连撑起身体都很难。
But he was unable to get out of bed, even it is very difficult to support the body.
但他完全无法下床，连撑起身体都很难。
应用推荐