Valves are produced in a variety of design types and materials. Proper selection is important to ensure the most efficient, cost effective and long lasting system.

阀门的结构和采用材料多种多样。为了确保效率最高，成本最合理，系统使用寿命最长，阀门的正确选型非常重要。

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Membrane separation technology is an efficient, cost effective process. Research progress on the processing of rice bran oil with membrane was reviewed in the paper.

膜分离技术是一种有效、低成本工艺；该文综述膜分离技术加工米糠油研究进展。

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Our products are designed to provide a high level of treatment in the most efficient, cost-effective manner.

我们的产品设计既高标准又经济高效。

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According to Mr Rae, combining schemes where appropriate would be more efficient and cost effective.

BBC: Public Accounts Committee

The measure would give ministers powers to direct councils to work more closely together to deliver more efficient and cost effective services.

BBC: Local government questions

This would give rise to a competitive industry that determines accurate prices for the most efficient and cost effective manner of reining in CO2's environmental threat.

ECONOMIST: Change of environment