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部技术局于1980年9月3日至6日在北京召开了“熔模精铸11~#中温模料鉴定会”。出席会议的有部内外13个单位的20多名代表。 会议听取了六二一所关于“熔模铸造用11~#液状中温模料的研制”和“成型工艺对腊模尺寸精度的影
Ministry of Technology Bureau in September 3, 1980 to 6 held in Beijing, “Investment Casting 11 ~ # in the mold material identification.” More than 20 representatives from 13 units inside and outside the Ministry attended the meeting. The meeting heard 621 on the “investment casting with 11 ~ # liquid temperature mold development” and "molding process on the accuracy of wax mold shadow