The hardness, surface quality and size precision of gas valves treated by above double heating...
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。
The silicon carbide whiskers synthesized by double heating, 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。
The synthesis of silicon carbide whiskers by double-heating method using carbon black and SiO_2 powder as raw materials is 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。
The synthesis of silicon carbide whiskers by double-heating method using carbon black and SiO_2 powder as raw materials is 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。
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