Avoid excessive heating of valve.
不要对阀门过度加热。
Not having an insulated roof area will certaimly increase your annual heating costs due to excessive heat losses.
但没有保温层的屋顶会因为额外热量的流失，而增加每年的供热成本。
Its characteristic is, fast heating speed, and overheat protection, avoid excessive current damage caused by burn machine, safe and convenient installation.
其特点是，加热速度快，并有过热保护，避免电流过大烧坏机器造成损，安全且安装方便。
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