亚洲国产区久久久久久国产_国产日韩欧美高清专区_高清亚洲先锋在线电影观看网站_韩国午夜福利理论片在线观看_成人国产第区在线观看_刘婷在线观看亚洲一区二区_男人舔女人天堂网站_国产 亚洲 丝袜 制服_www亚洲精品色片天堂_日本精品久久久中文字幕6

Qingdao Samsung Precision Forging Gear Co., Ltd. is a joint-stock enterprise established by Qingdao Precision Forging Gear Factory, which was founded in 1976

Is China's earliest use of precision forging production of professional gear business

National excellent forging process model enterprises, is China forging Association, China Gear Association sponsor.

Shandong Province Technology Development Center, Qingdao high-tech enterprises, and with the China Ocean University to set up a mold and special materials Institute.

The main products are automotive, engineering machinery and agricultural machinery drive axle differential precision forging gear.

National excellent forging process model enterprises, is China forging Association, China Gear Association sponsor.

Shandong Province Technology Development Center, Qingdao high-tech enterprises, and with the China Ocean University to set up a mold and special materials Institute.