最常见问题：串通投标和合同欺诈。
串通投标私下合约依靠一种声誉机制来执行。
The self-executing of the closet contract of the bid-rigging dependes on a reputation mechanism.
串通投标私下合约依靠一种声誉机制来执行。
The self-executing of the closet contract of the bid-rigging dependes on a reputation mechanism.
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