... oil charge 充油量 oil charging valve 加油阀 oil charging pump 加油泵 ...
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When accumulator is not used for a long period, the check-valve shall be closed to ensure that the oil pressure is above that charging pressure.
装置长期停止使用时，应关闭油口与压力油管之间的截止阀，保持蓄能器的油压在充气压力以上。
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