在真空条件下对AZ91 H P镁合金进行了激光熔凝处理。
AZ91HP magnesium alloys were treated by vacuum laser melting.
S2在真空条件下，在表面处理后的硅片背面蒸镀一层或多 层金属层；
S2, coating one or a plurality of metallic layers on the back of the silicon slice subjected to the surface treatment by vaporization on the vacuum condition;
以杉木屑为原料，采用氯化锌活化法，在真空条件下热裂解制备了活性炭。
Activated carbon was prepared from Chinese fir sawdust by chemical activation using zinc chloride under vacuum condition.
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