Home / Standards / GB/T 40738-2021 GB/T 40738-2021 Active Investment casting—Technical specification for rapid shell build with colloidal silica binder 熔模铸造 硅溶胶快速制壳工艺规范 Standard Type GBT ICS 75.140 CCS J31 Status 现行 Issue Date 2021-10-11 Implementation 2022-05-01 Responsible Dept 国家标准委 Drafting Unit N/A