Expansion turbine is widely used in light hydrocarbon recovery unit, but some important techniques and operating problems are still inquired into.

透平膨胀机现已广泛应用于轻烃回收装置，但对此类装置的一些重要的技术和操作问题一直在探讨之中。

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This article gives detail expatiation on pattern selection and performance of corrugated expansion joint used on flue gas energy recovery system.

对烟气能量回收系统波纹管膨胀节的选型及特性作了较全面的阐述。

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A number of leading indicators and survey data suggest that the recovery is proceeding weaker than expected, although they continue to point to economic expansion.

大量先行指标和调查数据表明，虽然欧元区经济正在继续复苏，但其步伐不及人们的预期。

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Some say that housing is economically important, but not so important as to be a necessity to economic recovery and continued expansion.

FORBES: Housing Continues To Be An Ominous Sign For Stocks

America's vigorous recovery and China's unbridled expansion have made it easy for Latin America and South-East Asia to export their goods.

ECONOMIST: The Fund's golden Rato

Christina is both a leading macro-economist and a leading economic historian, perhaps best known for her work on America's recovery from the Great Depression and the robust economic expansion that followed.

FORBES: Text Of Obama's Economic Team Announcement