气门导管，气门座圈，气门锁片，气门弹簧座，铸件系列。

Valve Guide, Valve Seat, Valve Lock, Valve Spring Retainer, Casting Products.

youdao

气门导管，气门座圈，气门锁片，气门弹簧座，铸件系列。

Valve Guide, Valve Seat, Valve Lock, Valve Spring Retainer, Casting Products.

youdao