建设工程主体结构的施工必须由承包人自行完成。
The main structure of the construction project must be completed by the contractor itself.
施工合同是发包人支付工程款，承包人进行建设的合同。
The construction contract is that contract letting party pay for projects and contractors conduct construction.
施工合同是发包人支付工程款，承包人进行建设的合同。
The construction contract is that contract letting party pay for projects and contractors conduct construction.
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