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See Chinese contents: GB/T 39330-2020 GB/T 39330-2020: Technical specification for surface treatment of titanium alloy castings
This Standard specifies surface treatment, quality inspection, quality control and technical safety of surface of titanium and titanium alloy castings. This Standard is applicable to surface treatment of titanium and titanium alloy castings produced by graphite processing molds, sand molds, metal molds and investment casting molds.
