With high technology DIN pure drawn seamless steel tube of light steel products with a phosphate, with imports of environmental linhua liquid steel for internal and external wall phosphating film formation, black phosphating, through the phosphating film of microporous absorption oily-type rust, both for block as dustproof.
Steel with bright color, black, steel surface color uniformity, consistency is beautiful appearance, good performance, steel rust.
Hydraulic system with steel tube, I company of steel exports