为保证本合同的履行，任一方须向另一方提交由双方同意的银行签发的履约保函。
To guarantee the implementation of the contract, each party shall submit to the other a performance guarantee issued by a bank agreed by both parties.
履约保函用来保证承包商按照合同规定正常履行其义务。
A performance bond guarantees that the contractor will perform the obligation according to the contract.
投标者中标后，未能在合同生效后的日历日内出具可以接受的履约保证金保函。
The bidder, as successful bidder, has failed to establish acceptable Performance Bonds within (number) calendar days after the effective date of the contract.
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