Engineering case

JUNCHENGPAI pipeline series has become China Gas, China Resources Gas, Hong Kong and China gas, new Austrian energy, China Petroleum, Sinopec, CNOOC, China Railway, China Construction, China nuclear construction, state grid, Vanke real estate, Sunac real estate, country garden, Evergrande real estate, Wuhan, Zhengzhou, Hangzhou, Xiamen and other subway, large enterprises gas, fire, water, Structure, threading pipe stable suppliers.