工艺：铸铁加热板它把预制好的加热管弯曲成所需要求。放入模具中，用铁水浇铸而成，然后进行精加工，从而得到理想的产品。
用途： 用于油扩散泵加热、高温塑机加热。
特点： 耐高温、使用寿命长、缺点太笨重。
Technology: cast iron plate heated it to good pre-heating of the necessary requirements of bending. Add to the mold, and cast from molten iron, then finished, to be the ideal product.
Use: the proliferation of pumps used for heating oil, high-temperature electric heating.
Features: high temperatures, long life, disadvantages too cumbersome.