1) high strength 2) strong protective function 3) sound corrosion resistance 4) antioxidation Hexagonal screen Have such characteristic as ... tough structure , flat surface , sound corrosion resistance , and antioxidation etc .It is widely used for ... ,21,20,19,18,17,16,15,143"75mm21,20,19,18,17,16,15,144"100mm17,16,15,14 We are producing ...