短语词组短语half lap scarf joint [建]半叠楔接;半搭接lap -joint flange 自由回转法兰;供应活套法兰;翻译lap p joint flange 活套法兰lap p joint 搭接头halfgauge lap scarf joint 半叠楔接multiple lap -joint 多接缝lap riveted joint 搭铆接合lap p joint stud 活套环圈 返回 lap joint