技师关闭主阀门后,泄漏的气体才逐渐停止。Jìshī guānbì zhǔ fámén hòu, xièlòu de qìtǐ cái zhújiàn tíngzhǐ.Only after the technician shut the main valve did the leaking gas gradually stop.
水管漏水了,快去关上阀门。Shuǐguǎn lòu shuǐ le, kuài qù guānshàng fámén.The water pipe is leaking, so go and close the valve quickly.
煤气灶的阀门要经常检查,确保安全。Méiqìzào de fámén yào jīngcháng jiǎnchá, quèbǎo ānquán.The valve of a gas stove should be checked often to ensure safety.