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Terms containing 开单成本 | all forms | in specified order only
SubjectChineseEnglish
ecol.单一种类不可再生资源开采成本函数a single variety nonrenewable resources mining cost function
ecol.单一种类不可再生资源开采成本函数function of extraction cost of a single kind of non-renewable resources
tech.开单成本billing cost

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