短语词组短语pile -out effect 挤出效应pile washing out 冲桩Pile out the water 挤去水分belled out pile 下端被扩口的灌桩out pile loop 反应堆外回路single pile static pull -out testing 单桩静拔试验belled d out pile 下端被扩口的灌桩washing out pile 冲桩 返回 pile out