作为简单描述，提供给比例阀电磁铁的电流需要被调节，不象应用常规阀的时仅有开关通或断那样简单。
As described earlier, the electrical current to the solenoid of a proportional valve needs to be regulated and not just simply switched on or off as is the case with a conventional valve.
贫磁铁矿由于含铁量低，采用常规工艺分选处理时，由于成本高而难以实施。
It is difficult to use conventional concentration technology to treat lean magnetite ore which has a low iron content, due to high cost.
磁铁饲料转盘转动“特定常规武器公约”，以便删除表盘右侧的空管。
The magnet feed dial rotates CCW so remove empty tubes on the right side of the dial first.
磁铁饲料转盘转动“特定常规武器公约”，以便删除表盘右侧的空管。
The magnet feed dial rotates CCW so remove empty tubes on the right side of the dial first.
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