Technical srecification for concrete strutural element with cold-rolled and twisted bars 并列题名：Technical srecification for concrete strutural element with cold-rolled and twisted bars Technical specification for concrete structures prestressed with unbonded tendons Technical specification for concrete structures with specially shaped columns 并列题名：Technical specification for concrete structures with specially shaped columns Technical specification for construction of cement stabilized base Technical Specification for Concrete Structures of Tall Building Technical specification for concrete-filled steel tubular girder bridge