competitive sealed bids 竞争性密封标单; 密封标单..
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竞争性密封标单 competitive sealed bids 投标单位申请投标 submission of the tender applications by the tendering units ..
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Federal regulations give preference to sealed bidding over contracting by negotiation, that is sealed bids over competitive proposals, if.
相对谈判订约方式，联邦法案更偏爱密封投标，密封投标比竞争性建议更具优势如果。
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