它可把火花放电频率控制在允许范围内。
It may limit the amount of sparkover to an acceptable rate .
管间温差也在允许范围内,不会引起过大的温差应力。
The temperature difference between two adjacent tubes is in a safe range, causing no excess thermal stress.
然而,这确实提供了保持每步电压变化在允许范围内的方法。
It does, however, provide a means of keeping the voltage change per step within per miscible limits.
And in Phase 2, you can sign up for however many more that's like, actually permitted.
在第二阶段,你可以报允许范围内的更多的课程。
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