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