Cov kav dej AWWA C200 steel dej yeeb nkab yog dav siv hauv cov teb / kev lag luam hauv qab no: Hydraulic fais fab chaw nres tsheb, potable Dej kev lag luam, irrigation penstock, dej phwj pov tseg yeeb nkab kab AWWA C200 qauv npog taub qab-welded, ncaj seam los yog kauv-seam welded structural cev, 6...
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