This standard applies to the acquisition, processing, management and application services of geographic space framework data and p

This standard is prepared to strengthen the operation and management of urban sewage treatment plants and unify the coloring stand

This specification is formulated to implement project supervision and quality control for the entire process of urban greening pro

This specification is formulated to unify the design and construction of the base and subbase of solidified pavement and to ensure

This standard is formulated to unify the drawing methods of heating engineering, ensure the quality of drawings, improve work effi

This regulation is formulated to meet the needs of sustainable development of the national economy, to rationally develop, utilize

CJJ/T 68-1996 Technical Specification for Maintenance of Urban Drainage Pipes and Pumping Stations CJJ/T68-96 CJJ/T68-1996 Standar

This standard applies to the performance test of soil subgrade, road surface materials and overall structure in urban road pavemen