KM4 is a large facility for space environmental simulation for the heat-vacuum test of man-made satellites.
KM 4是我国自行设计、制造的一座空间模拟设备，用于在地面上对各种人造卫星进行热真空测试。
It is applicable to such test as drying, heat treatment, etc.of articles under vacuum conditions in industrial and mining enterprises as well as in medical colleges and scientific research institute.
供工矿企业、医学院校、科研单位在真空条件下进行干燥热处理等。
The service condition of aluminium alloy casting dies are analysed in this paper. The test of vacuum heat treatment process by high pressure gas quenching for the dies have been carried out.
分析了大、中型铝合金压铸模的工作条件，进行了真空高压气冷热处理工艺的试验研究，选出了适宜的工艺参数，并应用于生产。
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