现浇砼"U"渠在屯降灌区三支渠改建工程中的应用
현요동"U"거재둔강관구삼지거개건공정중적응용
The Application of Cast-in-situ Concrete U-type Ditch in the Reconstructed Project of No.3 Branch Ditch of Tun-Jiang Irrigated Area
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