基本解释活套法兰词组短语短语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 joint type flange 搭接式法兰LJF Lap Joint Flange 松套法兰lap joint type loose flange 管口翻边活套法兰专业释义机械工程活套法兰