It is the key to clean and maintain the safety of gas water heater whether it can remove poisonous gas in time.

能否及时排走有毒气体，就成为燃气热水器清洁养护安全性的关键。

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It is the key to clean and maintain the safety of gas water heater whether it can remove poisonous gas in time.

能否及时排走有毒气体，就成为燃气热水器清洁养护安全性的关键。

youdao