草久久精品,成人久久亚洲,日本一道本在线视频,国产精品99一区二区,一区二区三区综合,久久精品5,自拍偷拍你懂的

Casus Products>> Casus

40CrMoV4-6 products of  Xingtai Steel is used to product in high strength and high temperature working environment,which used to automotive turbo system and exhaust pipe system bolt.The end user feedback that has heat resistance,good surface quality,good heat treatment and so on.This material was successfully applied to FAW Volkswagen, Chang an,FAIT and so on native and foreign famous automotive company.