clearance cut 和boss face在机械加工里是什么意思原句是：Mill front end boss faces and 2 clearance cuts on front end.还有那个boss face指的是什么?（还有一句里也有这个bossface：Mill side fixing boss faces on both sides

clearance cut 和boss face在机械加工里是什么意思原句是：Mill front end boss faces and 2 clearance cuts on front end.还有那个boss face指的是什么?（还有一句里也有这个bossface：Mill side fixing boss faces on both sides collective import clearance和collective export clearance什么意思? port of clearance 和station of despatch tax clearance certificate和 tax certificate Import custom clearance broker 和 Export custom clearance broker 这是客户询问我公司的 foreign bureau和immigration clearance分别是什么意思啊? the benefit of our company is not so good as before,so the boss has to_the expenses of the companyA cut inB cut downC cut upD cut off cut和cut down区别嗯嗯嗯 cut和cut out的区别 cut 和cut up的区别 cut up it 和 cut it up cut-up和cut up的区别 cut away 和cut in的区别 cut back和cut down的区别 Cut up和cut的区别 Merger clearance knee clearance ceiling clearance