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Alternating pulses of the two Chambers provide a stream which has small segments of alternating fluid from each inlet.
这两个腔室的交替脉冲提供了一种流，其具有小段的来自各入口的交替流体。
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At low speeds a continuous stream of narrow pulses is required to maintain speed.
在低转速时，窄脉冲连续流必须保持一定的速度。
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