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This specification is formulated to fully play the role of parks in recreation and improving the environment and to ensure the qua
CJJ 47-1991 Design Specification for Urban Waste Transfer Stations CJJ47-91 CJJ47-1991 Standard download decompression password: w
This standard is formulated to unify the urban land classification code, computerize the urban land classification statistics and
CJJ 45-1991 Urban Road Lighting Design Standard CJJ45-91 CJJ45-1991 Standard download decompression password: www.bzxz.net
This specification is formulated to unify the national urban road subgrade construction technical standards, ensure the quality of
This regulation is specially formulated to promote the use of recycled asphalt mixture, save raw materials and energy, and ensure
This standard is formulated to make the design of ancillary buildings and ancillary equipment of urban water supply plants meet un
This specification is specially formulated to provide design technology and parameters for high turbidity water supply project des