91中文精品,污污的视频免费在线观看,91就要激情,精品黄色网,欧美精品看片,久久久久久a亚洲欧洲aⅴ,天天干天天色综合网

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