亚洲国产美女精品久久久久,青青草色青伊人,国产免费好大好硬视频,一级做a爱片久久毛片,天天色天天舔,国产在线播放网站,特级aa毛片在线播放

CONTACTS
Tel:+86 335-7128826

Mobile:+86 18603394811

Fax:+86 335-7128803

Email:xiaojie-cheng@jm-casting.com

Addr.:North G102 Shenhe West ,E&T Development Zone ,Qinhuangdao China

Industrial development of precision casting[2016-05-11]
Compared with Southeast Asia and the Middle East, Chinas foundry industry has a great advantage in technology, quality and price, and its export prospect is very promising. When foreign enterprises enter into our country, their foundry retu...
Development of precision casting[2016-04-03]
Investment casting is also called lost wax casting. Its products are precise, complex and close to the final shape of parts. It can be used directly without processing or with little processing. Therefore, investment casting is an advanced...
Celebrating year's20th anniversary of the founding of JIAMENG[2015-12-31]
...