常見(jiàn)例句雙語(yǔ)例句The piston designed non-circular pin-hole can reduce the centralized stress and extend the work life of the piston.將活塞銷孔設(shè)計(jì)爲(wèi)異形銷孔可有傚降低銷孔應(yīng)力集中，延長(zhǎng)活塞使用壽命。 返回 non-circular hole