The diffusion of carbon in hot working process of cladding sheet is analyzed based on diffusion theory and variations of carbon concentration in the high-speed steel matrix.
根据扩散理论和高速钢加热过程中基体的含碳量变化规律，对复合板材热加工过程中碳的迁移进行了讨论。
KT-400 high vacuum oil diffusion pump, which is characterized by extreme high vacuum, pumping speed large, increase production efficiency while the vacuum pneumatic valves with automatic control.
KT - 400高真空油扩散泵，它的特点是真空极限高，抽速大，提高生产效率，同时真空气动阀门采用自动控制。
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