常見(jiàn)例句雙語(yǔ)例句For critical service a lantern ring and double packing can be provided with a leak-off connection.對(duì)于關(guān)鍵場(chǎng)合，一個(gè)套環(huán)和雙填料可以提供無(wú)泄漏連接。 返回 leak-off connection