The American Petroleum Institute (API) provides standards for pipe suitable for use in both the oil and natural gas industries (figure 4).

美国石油协会对适合应用于石油和天然气行业的管材制定了标准(如图4)。

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The American Petroleum Institute (API) sees this aspersion on the industry as a whole as unfair, since however much work those companies do they are only three in a sector of hundreds.

美国石油协会（API）认为这些关于石油工业的措辞总体来看有欠公平。因为不管再怎么错也是三家公司的事，也不能拖累全球几百家石油公司。

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The numerical result calculated by the formula for estimating the cetane number of distillate fuels from American Petroleum Institute (API) gravity and midboiling point.

用美国石油学会比重度和中沸点估算馏分燃料十六烷值公式计算得到的数值结果。

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The utter predictability of it all is becoming comical, so comical in fact that the American Petroleum Institute (API) responded to this budget proposal filled with stale, debunked and retreaded energy-related proposals by retreading the same statement it had issued in response to the proposed budget submitted by President Obama last year.

FORBES: The 'There You Go Again' Obama Energy Policy