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Just open a hot water valve in a sink or shower and let the system drain.
我们只要打开浴缸或淋浴喷头的热水出水阀，把热水器的水放掉就行了。
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The shower can be plumbed into the existing central heating system.
淋浴器可与现有的中央供暖系统接通。
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The shower can have its own system.
淋浴可以有其自己的系统。
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The shower can have its own system.
淋浴可以有其自己的系统。
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