In a vacuum exhaust system, sealing steam to the turbine shaft labyrinth seals must be admitted to avoid lossofvacuum.
在真空排气系统中,必须引蒸汽到汽轮机主轴迷宫式密封,以防真空损失。
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If you stop asking why you were killed instead of someone else, stop investigating the vacuum left by your loss, stop wondering what everyone left on earth is feeling, you can be free.