The registration address of zhengzhou zhengzhou zhong zhong zhong zhong zhong zhui zai, located in the central section of the dou jia road, is the zhengyang city market supervision authority, with legal representatives operating on general items: manufacture of machinery for the production of construction materials; mechanical manufacturing for construction works; manufacture of general equipment (other than special equipment); sale of mechanical equipment; sales agents for sale; sale of internet sales (other than goods for which a licence is required); installation services for general mechanical equipment; engineering management services; engineering services; exclusive equipment for electrical machinery; rental of machinery and equipment; rental of special equipment; rental services (other than licensing services); sale of machinery parts and spare parts; construction spare parts; construction of metal parts; research and development of machinery; import and export of goods; import and export of technical services; engineering technical services (with the exception of planning, surveying, design and supervision of items for which a licence is required by law; construction works (other than the construction of nuclear power stations, civil airport); construction professional works; construction works; construction engineering engineering works; construction services sub-contract works; construction services