The pumps are optimized to provide high efficiency operation over an extended period of time thus reducing operating and maintenance costs.
该泵经过优化了的设计使其能够长期高效地运行，从而降低了运行成本和维护费用。
The pumps are optimized to provide high efficiency operation over an extended period of time thus reducing operating and maintenance costs.
该泵经过优化了的设计使其能够长期高效地运行，从而降低了运行成本和维护费用。
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