小松母子盾构机械

　　母子盾构,是通过子盾构脱离母盾构可以继续掘进的方式，来实现不同内径隧道的挖掘工程。

　　MS shield allows construction of tunnels with different internal diameters and no intermediate shaft by separating the son shield from the mother shield under the groud and starting it.