Irrigation Main Pipe

Cov no yog ob lub kav dej rau dej. Koj puas paub tias lawv koom ua ke li cas? Nws yog los ntawm lub tshuab ntawm daim duab uas PVC ntawm ob qho kawg ntawm cov yeeb nkab yog melted thiab glued ua ke tom qab txias.