1.放置于下的;【矿】向下延伸的
2.有垫层的,有底基层的,有下支撑物的
1.“underlay”的过去式
1.The past tense of underlay
1.Construction Experience of High Pressure Jet Grouted Pile with Single Pipe at Underlaid Karst Area
隐伏岩溶区单管高压旋喷桩施工经验点滴