... thresholdhollow滑道末端凹口 thresholdlevel门限电平 thresholdlimitvalue临界阈值 阈限值 ...
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... 取样旋塞，取样阀 sampling cock 阀值 fe threshold; threshold level; thresholdlevel 采样阀 sampling valve ...
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... thresholdlevel门限电平 thresholdlevel阈值电平 thresholdlogic阈逻辑 ...
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