短語詞組短語coupler knuckle lock 鉤鎖鐵coupler knuckle thrower [鐵路]鉤舌鎖鐵coupler knuckle pin [鐵路]鉤舌銷coupler knuckle pin hole 鉤耳孔emergency coupler knuckle 緊急鉤舌repair of coupler knuckle 鉤舌堆焊修復(fù)emergency capacity coupler knuckle 緊急鉤舌knuckle of coupler 翻譯 返回 coupler knuckle