Home / Standards / GB/T 9977-1988 GB/T 9977-1988 Abolished The terms of coking products 焦化产品术语 Standard Type GBT ICS 75.160.10 CCS G15 Status 废止 Issue Date 1988-10-26 Implementation 1990-01-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A