这批设备出厂前必须经过连续七十二小时的压力测试。Zhè pī shèbèi chūchǎng qián bìxū jīngguò liánxù qīshí'èr xiǎoshí de yālì cèshì.This batch of equipment must undergo seventy-two consecutive hours of stress testing before leaving the factory.
这辆自行车出厂时已经装好了车灯。Zhè liàng zìxíngchē chūchǎng shí yǐjīng zhuāng hǎo le chēdēng.This bicycle already had its lights fitted when it left the factory.
每一批产品出厂前,工人都要仔细检查。Měi yì pī chǎnpǐn chūchǎng qián, gōngrén dōu yào zǐxì jiǎnchá.Before each batch of products leaves the factory, the workers must check carefully.