The hardness, surface quality and size precision of gas valves treated by above doubleheating...
用该炉进行气门的离子渗氮，其硬度、表面质量和尺寸精度均能达到产品的技术要求。
2
The silicon carbide whiskers synthesized by doubleheating, using carbon black and SiO 2 powders as raw materials, were studied.
以炭黑和二氧化硅微粉为原料，对双重加热法合成碳化硅晶须进行了研究。
3
Power guide roller for convenient plate alignment, Pneumatic elevation for rubber pressure roller, the drying system employs doubleheating chambers(electric heater) for superior efficiency.