$20
Classification and coding of city gas equipments and materials
城镇燃气设备材料分类与编码
中华人民共和国住房和城乡建设部
This standard is the original Chinese electronic standard.
After you successfully purchase, we will send the electronic version of this standard to your email address.
If you need translation, please contact email: ChineseStandardsLibraryS001@gmail.com.