The ratio of working time to standby unattended time of the tubular electric heating elements is less than 1 when the tubular electric heating elements work at interval.
所述电热管间隔工作时电热管的工作时间和非工作时间的比值小于1。
Optimization of far infrared heating elements and design of electric furnaces using the elements are stated, and examples are given.
本文着重阐述了远红外加热元件的优选方法和电炉设计步骤，并列举了实例。
Zhangjiagang City, Donghang Electric Appliance Factory, established in 1971, is to develop a variety of metal tubular heating elements manufacturer of the product.
张家港市东航电热电器厂成立于1971年，是研制各种金属管状电热元件产品的制造商。
Zhangjiagang City, Donghang Electric Appliance Factory, established in 1971, is to develop a variety of metal tubular heating elements manufacturer of the product.
张家港市东航电热电器厂成立于1971年，是研制各种金属管状电热元件产品的制造商。
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