Cangzhou Helong Pipe Industry Co., Ltd. Main business: fire protection trenches, malleable steel pipe fittings ~ water supply trenches, malleable steel pipe fittings ~ stainless steel trenches, malleable steel pipe fittings ~ plastic-coated grooves, plastic-coated malleable steel pipes Pipe fittings, fire-fighting equipment and other products are available in large quantities. Colleagues from all walks of life are welcome to negotiate and consult!