国产精品久久久久久久久久免费动|久久久久免费精品国产|日日夜精品视频|黄色av地址,婷婷激情久久,亚洲美女高潮久久久,超碰在线三级

Casus Products>> Casus

QSCM435-C of Xingtai Steel,used to produce high strength bolts of grade 12.9, the product is used for the engine bolt. Our customer Honda, Dongfeng No.2 Car VolkswagenFactory reflect the product surface quality is good, the decarburization layer depth is small, uniform hardness, can completely satisfy the application in the field of high strength bolts in the car.

1. Engine Bolts 2.engine