pull-out contacts

• 拉拔接触面

pull-out contacts的用法和样例：

例句

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。