回复:你和CARJACK讲得都有道理.
it is cylinder ring not valve,maybe cylinder wall.better know where is their location and how each them relation.functioning.if you have a cylinder (piston) in your hand you will see the detail
所有跟帖:
• to be exactly ... piston rings. -caddy- ♀ (164 bytes) () 10/12/2007 postreply 09:59:04