It is indispensable to install a suitable pipe union in the pipeline, in proximity to the burner, to allow for easy disassembly of the burner and opening of the boiler door.
为了便于燃烧器拆卸和打开锅炉门，在接近燃烧器的管子的地方装上合适的活接是必不可少的。
It is indispensable to install a suitable pipe union in the pipeline, in proximity to the burner, to allow for easy disassembly of the burner and opening of the boiler door.
为了便于燃烧器拆卸和打开锅炉门，在接近燃烧器的管子的地方装上合适的活接是必不可少的。
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