13. Hydraulic and pneumatic cylinder diameter seamless steel tubes with precision (GB8713-88) is a manufacturer of hydraulic and pneumatic cylinder with a diameter size with precision cold drawn or cold rolled precision seamless steel tubes.

14. Cold drawn or cold rolled precision seamless steel pipe (GB3639-2000) is used for mechanical structure, hydraulic equipment, high dimensional accuracy and surface finish of a good cold-drawn or cold rolled precision seamless steel tubes. Use precision seamless steel tube manufacturing equipment, mechanical structures or hydraulic, mechanical processing save hours of work can greatly improve material utilization, and help to improve product quality.

15. Stainless steel seamless tubes (GB/T14975-2002) is widely used in chemical, petroleum, textile, medical, food, machinery and other industrial corrosion resistant pipes and structural parts and components made of stainless steel hot-rolled (extrusion, expansion) and cold drawn (rolled) seamless steel tubes.