日韩精品丝袜爽爽91_国产美女自慰啪啪流白浆_婷婷五月天毛片在线观看_国产女人被躁到高潮的AV

Beijing Tengcon Technology Co.,Ltd, as the predecessor of Beijing Econtrolnet Co.,Ltd, was established in 2002. Tengcon Technology has 3 subsidiaries, which are Econtrolnet, Tengcon Zhi Yi Technology and Tengcon Automation Engineering Co., Ltd.In 2016, we established HK office (HK TENGCON GROUP LIMITED). Our products are widely used in the West-to-East Natural Gas Transmission Project, the Olympic works, the Tang Jiashan dammed lake Project. With nearly 10000 sets of production per year, We are widely accepted by our users and partners.

    此頁面上的內(nèi)容需要較新版本的 Adobe Flash Player。

    獲取 Adobe Flash Player

Copyright(C)2011 Beijing Tengcon Technology Co.,Ltd. TEL:010-59790086
Live Chat by comm100