Technical Research on the Anchor(Cable)Beam Net Support for the Coal Tunnel with Soft Roof, Soft Bottom and Soft Two sides是什么意思_Technical Research on the Anchor(Cable)Beam Net Support for the Coal Tunnel with Soft Roof, Soft Bottom and Soft Two sides在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句