composite roof meaning in English
组合屋面
Examples
- Control technology of composite roof in deep well coal bed
深井煤层复合顶板控制技术 - Bolt supporting technique for composite roof in tunlan mine
屯兰矿复合顶板巷道锚杆支护技术与实践 - Surrounding rock controlling of gob - side entry under composite roof
复合顶板沿空巷道的围岩控制效果分析 - Application of combined supporting technique for composite roof
锚索联合支护技术在复合顶板管理中的应用 - Bolting with strip and wire mesh supporting in deep and composite roof roadway
深部巷道复合顶板锚带网支护技术