shaanxi zhuoheng oilfield equipment inspection service co., ltd. was established in january 2015. the company's address is located in xi'an international port area. the current inspection businesses include air respirator detection, composite gas cylinder detection, gas detector detection and breathing valve detection. our company serves the inspection and testing of changqing oilfield, yanchang petroleum, bohai drilling and some local enterprises for many years. and provide on-site inspection and sample delivery inspection according to customer requirements. the serviceable areas include: xi'an, xianyang, yulin, weinan, yan'an, baoji and other areas, providing high-quality and reliable land...