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The frequency is to be varied at the rate of 1 hertz per minute between 10 and 55 hertz and return in not less than 90 nor more than 100 minutes.
What does it mean?
频率的变化范围是从10赫兹到55赫兹(以每分钟1赫兹的速度变化),同时频率返回范围每分钟是不少于90不大于100
[ 本帖最后由 vincent_chen 于 2007-9-3 16:48 编辑 ] |
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