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| API 美国石油学会比重指数 | |||
| 美国石油学会标准比重 | |||
| API 比重 | |||
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| 美国石油学会重力指标 (美国石油学会采用的一种公认的石油比重指标，可粗略衡量石油的质量) | |||
| English thesaurus | |||
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| American Petroleum Institute gravity (index) | |||
| measure of liquid specific gravity as defined by the American Petroleum Institute | |||
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API gravity : 4 phrases in 4 subjects |
| Drilling | 1 |
| Engineering geology | 1 |
| Oil / petroleum | 1 |
| Technology | 1 |
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