短语词组短语built pile process 成桩工艺built -in mini steel pipe pile 微型嵌岩钢管灌注桩quality of built -up pile 成桩质量Built -up Steel Pile [建]装配式型钢桩built in steel pipe pile 嵌岩钢管灌注桩pile built in place 就地灌注椿 返回 built pile