Dezhou Guangyuan Environmental Protection Technology Co., LtdÃ¯Â¼? located in Baide Road Economic Development Zone, Dezhou, Shandong, China, convenient transportation, is a collection of industry and trade in one of the high-tech private enterprises. Strong technical force, advanced production technology, perfect detection means, the product quality stable and reliable. I rely on the company to institutions of higher learning, combination, introduced a cold environmental air conditioning, roof ventilators..