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。
KM4 is a large facility for space environmental simulation for the heat-vacuum test of man-made satellites.
抽样的产品必须通过不同条件的测试，例如骤冷骤热的温度差测试，真空测试，强压测试等。
Selective products have to pass the test in different conditions, such asshock heating and cooling, vacuum and pressure.
抽样的产品必须通过不同条件的测试，例如骤冷骤热的温度差测试，真空测试，强压测试等。
Selective products have to pass the test in different conditions, such asshock heating and cooling, vacuum and pressure.
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