So we're going to pretend like we don't have any of the rods installed and pistons and all that stuff. 所以我們要假裝沒有安裝任何連桿和活塞之類的東西。 And we've already checked main bearing clearance and all that stuff and everything's good. 我們已經檢查過主軸承間隙和所有這些東西,一切...