contactorn.电流接触器；开关contactn.接触；联系；熟人v.(与)联系；(与)接触adj.接触的contact segment接触段,接触环,接触片contact circuit接点电路contacting ways联系途径contact adhseion触点粘连contact toxicity接触毒性contact laxative接触性泻剂contact scribing接触式划片contactless unit无接点单元, 无接点部件contact blasting外部装药爆破Contact Test Set接触测试装置

1. Slowly pull the assembly outward to open check allowing exposure of the seat and clapper contact area for cleaning.
   慢慢将止回阀往外拉，打开止回阀，使得阀座和阀瓣接触面暴露出来便于清洗。
2. We have seen oil reinvasion above this contact,water reinvasion below,or no reinvasion at all.
   我们能看到油的二次侵入在接触面的上部，水的二次侵入在接触面的下部或者是根本没有。