Home / Standards / GB/T 39314-2020 GB/T 39314-2020 Active General technical directives for aluminum alloy plaster investment casting 铝合金石膏型铸造通用技术导则 Standard Type GBT ICS 77.120.10 CCS J31 Status 现行 Issue Date 2020-11-19 Implementation 2021-06-01 Responsible Dept 国家标准委 Drafting Unit N/A