Crane globe valves are highly efficient for services requiring frequent operation and throttling when pressure drop across the valve is about 20% of inlet pressure.

当通过阀门的压降为管路压力的20%左右时，美国克雷恩截止阀就能够高效应用在频繁操作和节流的应用场合。

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This product has the ability to hit breaking, safe, reliable, long life, frequent operation, compact structure, small size, light weight, the basic need maintenance.

本产品具有开断能力打、安全可靠、电寿命长、可频繁操作、结构紧凑、体积小、重量轻、基本不需要维修等优点。

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The traditional gas chromatography for testing dissolved gas in transformer oil has the disadvantage of multiple analytic links, frequent operation, long testing cycle and large errors.

传统气相色谱法检测油中溶解气体存在分析环节多、操作频繁、试验周期长、误差大等弊病。

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Initiatives such as the Asian-African Strategic Partnership established to improve investment opportunities between Asia and Africa, the annual China-Africa Co-operation Forum and frequent trips by high-level Chinese officials to resource-rich countries such as South Africa and Nigeria have bolstered the China-Africa relationship.

CENTERFORSECURITYPOLICY: An African "Marshall Plan"

In 2014 it intends to launch, at a cost of a few million dollars, a set of small space telescopes whose purpose will be to seek out asteroids which are easy to get to and whose orbits return them to the vicinity of Earth often enough for the accumulated spoils of a mining operation to be downloaded at frequent intervals.

ECONOMIST: Mining asteroids: Going platinum | The

Return guarantees are a frequent feature but are not integral to the operation of the tax game.

FORBES: How The Smart Money Uses Tax-Deferred Annuities