为了从供应商那招徕报价，最佳价格采购过程取决于招标邀请书，也被叫做投标邀请函，投标邀请书或密封投标。
To solicit offers from providers, the best-price purchase process relies on an Invitation to Bid (ITB), also known as Invitation to tender (ITT), Invitation for Bids (IFB), or Sealed Bids.
除了一些小改动之外，《建议书邀请函》没有任何变化，这确保了波音成为唯一的投标人。
Apart from some minor tweaks, nothing changed, ensuring that Boeing would be left as the sole bidder.
除了一些小改动之外，《建议书邀请函》没有任何变化，这确保了波音成为唯一的投标人。
Apart from some minor tweaks, nothing changed, ensuring that Boeing would be left as the sole bidder.
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