Large ridge greenhouse is a kind of greenhouse with high tunnel which has larger space inside and provides all-dimensional sunlight for inside plants. It is an increasingly popular trend for growers and a proven technology for crop production. Large ridge
It use paper roll in blank or printed as raw material. Consists of automatic centre forward glue, fixed length and cutting, bottom indentation , folding bottom, bottom glue.
ERW50 tube mill/pipe mill/welded pipe production/pipe making machine is used to produce steel pipes of 16mm-50mm in OD and 0.7mm-3.0mm in wall thickness, as well as corresponding square and rectangular pipe.