激情毛片无码专区,高清一区二区三区免费视频,色综合天天视频在线观看,黄色成人网站免费无码AV

中文版 - ENGLISH

Top Products

•	Long chain dicarboxylic acid

•	Zirconium & hafnium chemicals

Manufacturing base:
NO. 16, Guangtong Road, Longquan Town, Zichuan District, Zibo City, Shandong, China
Oversea Sales:
Tel: 86-532-86959667 Fax: 86-532-86760085
E-mail: sales@changyuintl.com
Domestic Sales:
Tel: 86-533-5860002、86-533-5860039 Fax: 86-533-5860296
E-mail: gtsales@changyuintl.com

Branch

Qingdao Guangtong Biotechnology Development Co., Ltd.

Qingdao Guangtong Biotechnology Development Co., Ltd is a biotechnology company located in No. 27, London Road, QingdaoFree Trade Zone. The company was invested by Zibo Guangtong Chemical Co., Ltd in 2002. With strong researching, manufacturing and marketing ability, the company mainly focuses on researching, producing and marketing of long chain dicarboxylic acids and its downstream products.