Standards

DB21/T 20012-2024 Active

DB21/T 20012-2024 Road maintenance project base grouting reinforcement technical specifications

Publish Date: 2024-11-26

DB21/T 20011-2024 Active

DB21/T 20011-2024 Highway Reconstruction and Expansion Engineering Subgrade and Pavement Jointing Technical Specification

Publish Date: 2024-11-26

DB21/T 20010-2024 Active

DB21/T 20010-2024 The standard for management and service of snow and ice tourism areas

Publish Date: 2024-11-26

DB21/T 20009-2024 Active

DB21/T 20009-2024

Publish Date: 2024-11-26

DB21/T 20008-2024 Active

DB21/T 20008-2024 Ski resort inspection and rescue personnel management standard

Publish Date: 2024-11-26

DB21/T 20007-2024 Active

DB21/T 20007-2024 Ice and Snow Tourism Service Specification

Publish Date: 2024-11-26

DB21/T 20006-2024 Active

DB21/T 20006-2024 Black soil sloping planting technical regulations

Publish Date: 2024-11-26

DB21/T 20005-2024 Active

DB21/T 20005-2024 The technical specification for stripping and utilizing surface soil from cultivated land during construction

Publish Date: 2024-11-26

DB21/T 20004-2024 Active

DB21/T 20004-2024 Rerationalization Technology Specification for Eroded Farming Ditch Reclamation

Publish Date: 2024-11-26

DB21/T 20003-2024 Active

DB21/T 20003-2024

Publish Date: 2024-11-26

DB21/T 20002-2024 Active

DB21/T 20002-2024 The technical specification for in-situ composting of straw returned to the field

Publish Date: 2024-11-26

DB21/T 20001-2024 Active

DB21/T 20001-2024 Soil fertility improvement and reduction of soil barriers in black soil farmland technical specifications

Publish Date: 2024-11-26