... speed electrode 校速电极 speed fluid drive 液压变速器 speed gear 变速齿轮 ...
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variable speed fluid drive 变速液压传动
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The safety valve can make the lifting fluid-pressure drive circuit of a fork lift truck or a crane obtain not only high efficiency ascending speed, but also reliable and safe descending speed.
该安全阀使叉车或起重机的起升液压驱动回路既有高效率的上升速度，又有可靠的安全下降速度。
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