... raw pot glass 光学玻璃坯块 Raw optical glass 光学毛坯 Raw materials and raw glass 原材料和未加工的玻璃 ...
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Optical glass is made of raw materials-sand, lime, and soda of the highest purity.
光学玻璃是由高纯度原料：沙子、石灰、纯碱制成的。
The raw materials are added into a crucible for melting, then the obtained glass liquid is added into a platinum crucible for melting, clarifying and homogenizing by an optical glass fusion method.
该光放大用玻璃的制备方法是把原料加入坩埚中，进行熔化，得到玻璃液，加入铂坩埚中，再用光学玻璃熔制法使其熔融、澄清、均化。
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