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,.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.