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Lubricate oil automatic balance device, keep the equal oil level equal in each unit.
机油自动平衡装置，保持各单元油面平衡。
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The moment device is a key part of a force-balance accelerometer.
力矩器是力平衡加速度表的关键组件。
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The moment device is a key part of a force-balance accelerometer.
力矩器是力平衡加速度表的关键组件。
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