• <rt id="6gwoo"><acronym id="6gwoo"></acronym></rt>
  • <li id="6gwoo"><source id="6gwoo"></source></li>
      中文版 - ENGLISH
     
    Top Products
    Contact Us
    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. 

     
    Copyright(C)2015 , Shandong Guangtong New Materials Co., Ltd. All Rights Reserved.  Supported by  ChemNet  ChinaChemNet Toocle Copyright Notice
    久久精品国产秦先生| A男人的天堂久久A毛片| 伊人久久亚洲综合| 久久精品国内一区二区三区| 91精品久久国产青草| 久久久久亚洲av毛片大| 久久久久免费看黄A片APP| 久久aa毛片免费播放嗯啊| 久久综合狠狠综合久久97色| 国产精品久久久久一区二区三区| 久久一日本道色综合久久| 国产亚洲色婷婷久久99精品| 四虎国产精品成人免费久久| 91精品国产综合久久久久| 亚洲国产精品无码久久久蜜芽| 精品国产99久久久久久麻豆| 久久香蕉国产线看观看亚洲片| 精品久久久久久久中文字幕| 久久精品国内一区二区三区 | 久久久久亚洲Av片无码v| 久久亚洲国产精品五月天婷| 青青国产成人久久激情911| 久久6这里只有精品| 麻豆成人久久精品二区三区免费| 久久久久国产精品| 国内精品伊人久久久久777| 狠狠久久综合伊人不卡| 久久精品午夜一区二区福利| 久久国产免费直播| 大香网伊人久久综合观看| 久久只有这里有精品4| 久久久久se色偷偷亚洲精品av| 久久天天躁狠狠躁夜夜躁2O2O| 亚洲国产精品无码久久久不卡 | 久久人妻无码一区二区| 国产精品99久久精品| 亚洲国产精品久久人人爱| 69国产成人综合久久精品91| 91精品久久久久久久久久| 91精品一区二区三区久久久久| 久久精品中文騷妇女内射|