磨擦

You can magnetize a needle by rubbing it with a magnet.

用磁铁针可使之磁化。

It has vanguard technology of friction welding and chroming and so on.

具接和镀铬等先进生产工艺。

Pain with motion is the predominant finding， and crepitation may be palpated with pa ive motion.

最突出的表现是活动时疼痛，被动活动可触到感。

It is pronoumced by raising the tongue tip against the upper teethridge to block the air and then putting it down to release the air.

下唇和上齿接触，形一条狭缝，气流从狭缝中而出。

Small cubage and large filling capacity make rubber stopper difficult to drift when washing, one another extrude and attrite, bring badly rubber scurfs and bad washing.

容积小，装塞容量大，使胶塞在清洗时产生堆积而无法浮动，相互挤，会严重产生胶塞皮屑和清洗不好。