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平常信函
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平常信函
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信函
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平常信函
信函的一种常见形式。邮政企业在收寄时不出具收据,处理时不登记,投递时不要求收件人签收,不接受用户查询。简称平信。
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parallel match
parallel mechanism
parallel memory
parallel model
parallel modeling
parallel molecular genetic analysis
parallel momentum
parallel multistep method
parallel of altitude
parallel of declination
parallel of latitude
parallelogram
parallelogram axiom
parallelogram identity
parallelogram illusion
parallelogram law
parallelogram linkage
parallelogrammatic number
parallelogram of periods
parallelogram polyomino
parallelogram rule
parallelohedron
parallelologic triangle
parallelometer
parallel operating system
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