May ,our waterproof telephone was designated purchase by the the project owner ,because of the durable using ，scientific and reasonable design and timely client review .Otherwise ,our customers range expanded to ：Yunnan copper (group) Co., LTD， ZIJIN MINING GROUP CO.,LTD ，Tibet mining development Co., LTD，Shandong gold mining stock Co., LTD，Hunan nonferrous metal group，Shenhua Energy，Hubei daye non-ferrous metal group And so on.
