ball pin

基本解释

Quick Release Pin, Ball lock pin, Detent pin, Locator pin.
自主开发产品：快卸销，定位销，球锁销，快速插销，不锈钢销。
Surface roughness of hardened zone of the ball head pin has been improved on by the use of inert gas …
在感应加热过程中采用惰性气体和改进的工装夹具改善了淬火区的表面粗糙度。
Harsh requirements for depth of hardened layer of the ball head pin have been satisfied by using inductor designed to combine circle electromagnetic field with vertical one.
采用周向磁场和纵向磁场相结合的感应器设计技术达到了球头销的苛刻的硬化层深度要求；

When it's time to roll out the dough, Kimball suggests using a one-piece, tapered rolling pin, without ball-bearings.
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In fact, this pin is more like rolling a gutter ball, as it refers to a situation in which a stock closes at a strike price on expiration day.
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Yet a professional tennis player can't lob a ball a few feet into the air and hit an overhand smash without being able to hear a pin drop?
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