加热器管表面功率负荷低，介质不会在表面结垢、粘结、烧焦、碳化等，是粘性、热敏性液体介质加热的理想元件。
Low power rate on the surface of heating tube. Medium does not scale, congeal, sinter or carbonize on the surface, and so is ideal heating element for viscous, and heat sensitive liquid medium.
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