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撞楔

撞楔

撞楔

1

Impact and Wedge Method Applied to Drive through Roof Falling Area in Mining Gateway

撞楔法通过巷道冒顶区

2

Application of mental impacted wedge-block in roadway crossing layer construction

金属撞楔在巷道穿层施工过程中的应用

3

Application of bumping beam method in recovering flooded slop

撞楔法在恢复水淹斜井中的应用

4

Pre-support through hammering wedge in cave mouth digging

撞楔超前支架在平巷硐口开挖中的应用

5

Appliance of Shoving and Wedge in Kaolin Clay Flow Sand Seam

撞楔在高岭土矿过流砂层中的应用

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