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张家口
张家口A sealing and fitting structure for a well body
张家口Closed physical examination and well inspection
张家口A New Type of Closed Composite Plastic Inspection Well
张家口Business license
张家口High and New Technology Enterprise Certificate
张家口Low-carbon safe operation of urban and rural water supply systems applicable technology and equipment
张家口Assembled high-strength composite resin inspection wells
张家口Development and Application Technology Integration of Assembled High Strength Composite Resin Water Supply Inspection Well
张家口Quality management system certification
张家口Occupational Health Management System Certification
张家口Environmental Management System Certification
张家口People's Republic of China communications industry standard "underground communications pipeline with preformed composite man (hand) hole
张家口China Association for the Promotion of International Science and Technology "assembled high-strength composite resin inspection wells
张家口Group standard for IoT intelligent terminal protection water meter wells
张家口Standardization Working Committee of China Association for the Promotion of International Science and Technology
张家口Housing and Construction Department Announcement
张家口Technical standards for assembled high-strength composite resin water supply wells
张家口A structural type of manhole cover
张家口A kind of combined municipal inspection well
张家口Electricity intelligent manhole cover
张家口Split type composite inspection well
张家口A kind of FRP resin inspection well with prefabricated composite seal at the branch pipe opening
张家口An IoT monitoring well tool
张家口A polygonal reinforced well
张家口A composite well with lateral expansion
张家口A kind of interlocking diagonal reinforcement at the corners
张家口A reinforcing structure with reinforcing bars and reinforcing blocks
张家口A deepening tube with grid-like reinforcement
张家口A staggered reinforcement structure at the corners
张家口A re-straight fit structure of well body and deepening pipe
张家口A concave-convex structure docking mating structure applied to a closed composite well
张家口A mating composition of a ribbed assembly for a split well
张家口A surface reinforced structure with multiple shape fits on the surface
张家口A seal fitting structure at the position of well body and top cover
张家口A reinforced structure with inner and outer diamond fit