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中国大学MOOC: 天然气的相对密度一般为0.58~0.62,石油伴生气为0.7~0.85The relative density of natural gas is 0.58 ~ 0.62, and that of oil associated gas is 0.7 ~ 0.85
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中国大学MOOC: 天然气的相对密度一般为0.58~0.62,石油伴生气为0.7~0.85The relative density of natural gas is 0.58 ~ 0.62, and that of oil associated gas is 0.7 ~ 0.85