投标有效期内担保投标人不撤标/不拒签的保函（1~2%），中标后转为履约保函。
Guarantee of 1-2% that a bidder will not withdraw or refuse to sign during validity, converting to a performance bond on award.
AI 光伏设计平台免费开放：从术语到完整设计图纸与可研报告。