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井式低真空多用炉是上海工具厂刃具研究所的科研成果,并转让给上海远东热处理材料设备厂试制,经两年多的生产使用正式
Well-type low-vacuum multi-purpose furnace Shanghai Tool Factory Cutting Tool Research Institute of scientific research and transfer to the Shanghai Far East heat treatment materials and equipment trial, after more than two years of production and use of formal