Standards

DB21/T 4353-2025 Active

DB21/T 4353-2025 The technical specification for corn straw crushing and incorporation into the soil through ploughing and mulching operations

Publish Date: 2025-12-16

DB21/T 4352-2025 Active

DB21/T 4352-2025 The technical specifications for cultivation of stingray sea cucumber using net cage system

Publish Date: 2025-12-16

DB21/T 4351-2025 Active

DB21/T 4351-2025

Publish Date: 2025-12-16

DB21/T 4350-2025 Active

DB21/T 4350-2025 Predictive Guide for Ice Disaster Prevention in Cultivation of Stem-and-Ribbon Sea Cucumber Ponds

Publish Date: 2025-12-16

DB21/T 4349-2025 Active

DB21/T 4349-2025 Small-scale weir operation and management regulations

Publish Date: 2025-12-16

DB21/T 4348-2025 Active

DB21/T 4348-2025 Dike Engineering Operation Management Regulations

Publish Date: 2025-12-16

DB21/T 4347-2025 Active

DB21/T 4347-2025 Management specifications for urban public bus and electric vehicle parking facilities

Publish Date: 2025-12-16

DB21/T 4346-2025 Active

DB21/T 4346-2025 The standard for urban and rural transportation integration operation service

Publish Date: 2025-12-16

DB21/T 4345-2025 Active

DB21/T 4345-2025 Bus shuttle customized service specification

Publish Date: 2025-12-16

DB21/T 4344-2025 Active

DB21/T 4344-2025 Road transport electronic certificate operation service specification

Publish Date: 2025-12-16

DB21/T 1225-2025 Active

DB21/T 1225-2025 Seismic-resistant and Liveable Farmhouse Design Standards

Publish Date: 2025-12-16

DB21/T 4343-2025 Active

DB21/T 4343-2025 Urban Smart Heating System Technical Regulations

Publish Date: 2025-12-16