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IP/MPLS/IPRAN
Location：China National Petroleum Corporation(CNPC) issued the certificate of Level I supplier to Huahuan
China National Petroleum Corporation (CNPC) issued the certificate of Level I supplier to Huahuan on 11th Novermber, 2012.
CNPC is China's largest oil and gas producer and supplier, as well as one of the world's major oilfield service providers and a globally reputed contractor in engineering construction.
