整个系统都要有介质加热和注入防冻液的途径，以避免形成类似冰的甲烷水合物（译者注，即可燃冰）。
Throughout the system there would be ways of warming things up and injecting antifreeze to stave off the formation of icelike methane hydrates.
适用于非腐蚀性的液体、气体和蒸汽，在各种加热系统中起温度控制的作用，当被控介质温度升高时，控制阀关闭。
It is suitable for controlling temperature of non-corrosive liquids, gases and vapors in various heating systems. When the temperature of the controlled medium rises, the control valve is closed.
因两者余热介质不同而产生不同的余热锅炉和加热系统。
It makes different excess heat boiler and heating system as different media.
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