• SY Seres Tube Machines are deal equipment o producing concrete tubes owit is reasonable in design, beautiful in appearance relable in perfnient in operating s quality is up to State Standards of g811836-89in agncultural imgation and draining pro ects in ctesWith this seres of machines the concrete tubes with speo canons of 200-1000mman be produced by using pulverized coal ash slag sands and rushed stone pusingute quantty of cement The tubes produced with ths sees machines are even in theirwall thickness, smooth on surace gh n compression strength covent and m noneco and exent n an-g wcha w used ina cra aoind draining projects in cites.