坝内垫层钢管
embedded penstock with cushion layer
侧边墙介电垫层
sidewall dielectric spacer
弹性垫层
elastic cushion layer
interpolating polymer layer
地沥青垫层护岸
asphalt mattress revetment
垫层侧面软土约束
soft soil restrain along lateral surface of cushion
垫层管
cushion pipe
penstock with cushion course
垫层厚度
thickness of bedding course
cushion thickness
Thickness of Cushion
depth of bed course
underlayer thickness
thickness of ore cushion