单词	spiral joint
释义	spiral joint 蜗状关节
随便看	import and export goods inspection import and export licence import and export licence system import and export license system import and export list import and export management import and export market import and export market structure import and export merchant import and export mix import and export of coins and bullions Import and Export Practice import and export price statistics import and export quota system import and export restriction import and export restrictions import and export system import and export tariffs import and export trade import and export trade statistics import and export volume Import and export volumes import and exprot Import a new bookmark file import announcement