located in the second biggest oilfield of China –shengli Oilfield , is a comprehensive enterprise of oilfield manufacturing and service providing With the faith that QUALIYU IS THE SOUL OF THE COMPANY ,Linda has the professional team for the quality inspection . Linda establish a strictly quality control system according to API Q1 to confirm the goods we supplied are qualified We have fast and efficient after-sales team , We have exported our goods to Canada , USA , UAE , India , Indonesia , Singapore ,Venezuela, Peru….