GB/T 41039-2021现代煤化工项目设计煤种和校核煤种确定通则标准
英文:The general rules of determing designed coal and checked coal in modern coal chemical technology GB/T 41039-2021介绍: 国...
英文:The general rules of determing designed coal and checked coal in modern coal chemical technology GB/T 41039-2021介绍: 国...