-
The roof separation layer is the biggest security hidden danger in bolt support tunnel.
顶板离层是锚杆支护巷道最大的安全隐患之一。
youdao
-
The support with bolt and cable is a main way of roadway drivage.
锚杆锚索支护是巷道掘进的一种主要形式。
youdao
-
The support with bolt and cable is a main way of roadway drivage.
锚杆锚索支护是巷道掘进的一种主要形式。
youdao