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大宗货物
生产与消费之间需要大批量运输的商品。以初级产品、原材料等为主,由铁路、水路和管道作为主要运输方式。
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conformal map
conformal mapping
conformal mapping in electromagnetic field
conformal mapping onto itself
conformal mapping theorem
conformal mapping theory
conformal map projection
conformal martingale
conformal measure
conformal metric
conformal net
conformal Newtonian gauge
conformal plane
conformal projection
conformal projection chart
conformal property
conformal radius
conformal representation
conformal solution theory
conformal space
conformal structure
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conformal tensor
conformal time
conformal torsion
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