求翻译：17.1 政府采购项目的采购合同内容的确定应以招标文件和投标文件为基础，不得违背其实质性内容。政府采购项目的采购合同自签订之日起七个工作日内，买方应当将合同副本报同级政府采购监督管理部门和有关部门备案。合同将在双方签字盖章并由卖方递交履约保证金后开始生效。是什么意思？

17.1 Government procurement contracts procurement project should be determined by the contents of the tender documents and tender documents, based on its substantive content shall not be violated. Government procurement project since the signing of the purchase contract within seven working days fro

17.1 * government procurement contracts for the purchase of items of content should be determined in order to tender documents and tender document-based, shall not be contrary to its substantive content. Government procurement contracts for the procurement project from the date of the signing, the b

17.1 The government procurement project purchase contract content determination should take tender the document and the bid document as a foundation, no violation whatsoever will permitted its substantive content.The government procurement project purchase contract date of seven working days from in

17.1 procurement contracts determine the content of government procurement projects should be based on the tender documents and tender documents, must not run counter to its substantive content. Signed procurement contracts from Government purchases within seven days of, buyer should report the cont

17.1 procurement contracts determine the content of government procurement projects should be based on the tender documents and tender documents, must not run counter to its substantive content. Government procurement projects of the purchase within seven working days from the date of signing of the