[VIP第1年] 指数:7
通过认证 (1) The product is made of high-quality 40Cr steel, forged and rolled for secondary forming.
(2) Pre-heat treatment process such as normalizing-hardening and tempering.
(3) The machining center optimizes tolerances, reduces noise, and avoids unreasonable wear.
(4) The surface heat treatment process of the gear ring can improve the wear resistance and impact resistance of the gear ring.
(5) The unified brand carton, inner bag and integral foam packaging, which is strong and beautiful.
