An electron tube or a vacuum tube.
电子管或真空管。
Diangong heat tube Vacuum tube heat collector.
电工太阳能热管真空管集热器。
I think this was a vacuum tube system where there is no drag.
我认为这是一个真空管系统在没有阻力。
Finally the test results of vacuum tube operation are presented.
最后给出了电子管工作时的测试结果。
Finally the test results of vacuum tube operation are presented.
最后给出了电子管工作时的测试结果。
应用推荐