Beijing Dekang Jingyuan Environmental Protection Equipment Co., Ltd. sells machinery and equipment, accessories, water treatment equipment, air purification equipment, electrical equipment, cables and wires, fire fighting equipment, energy-saving and environmental protection equipment, electrical equipment, mechanical and electrical equipment, instruments and meters, office supplies, hardware and electrical appliances (excluding electric bicycles), building materials, chemical products (excluding hazardous chemicals), computers, computer software and auxiliary equipment, electronic products; entrusted processing of environmental protection equipment, water treatment equipment, electrical equipment; import and export of goods (excluding state-operated trade management goods); landscaping engineering; basic software services; application software services; environmental protection monitoring; technology development; agency for import and export; technology transfer; technology promotion; technical services; water pollution treatment; technical consultation (excluding intermediation); computer system integration; general contracting; labor分包; specialized contracting; energy-saving technology development; technical testing; computer system integration; educational technology development; new energy technology development; air pollution treatment; internet information services; engineering survey; urban waste collection, collection, transportation, and treatment.