Home / Standards / GB/T 24503-2024 GB/T 24503-2024 Active Drive sprocket for chains (round link) for mining 矿用圆环链驱动链轮 Standard Type GBT ICS 73.100.40 CCS D93 Status 现行 Issue Date 2024-09-29 Implementation 2025-04-01 Responsible Dept 中国煤炭工业协会 Drafting Unit N/A