Turn on back wash drainage valve (V-4) and air scour valve (V-2). Air scour lasts for a moment.

将反洗排水阀(V - 4)，空气洗净阀(V - 2)置于[开]，进行空气清洗并持续一段时间。

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Many make do without air fresheners, hair conditioner and other fripperies once deemed essential.Many scour the internet for special deals.

许多人试着过上了没有空气清新剂、护发素的日子，有些人甚至会为特殊优惠而在网上淘东西。

youdao

Many make do without air fresheners, hair conditioner and other fripperies once deemed essential.Many scour the internet for special deals.

许多人试着过上了没有空气清新剂、护发素的日子，有些人甚至会为特殊优惠而在网上淘东西。

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