Beijing Dekang Jingyuan Environmental Protection Equipment Co., Ltd. sells machinery and equipment, accessories, water treatment equipment, air purification equipment, electrical equipment, wires and cables, 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 (except for 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 intermediary services); computer system integration; general contracting of construction; 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; city waste collection, transportation, and treatment.