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教学用电子仪器的环境要求和实验方法
Quality inspection provisions and test methods for the electronic teaching instruments
价格:¥0.00
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平面几何演示器
The plane geometry demonstrator
价格:¥0.00
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初中化学实验箱
Chemical experimental kits for junior secondary schools
价格:¥0.00
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立式隔膜电解槽技术条件
Technical specifications of vertical electrolysers with the block membrane
价格:¥0.00
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矿物岩石标本
Samples of minerals & rocks
价格:¥0.00
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月球运行仪技术条件
Technical specifications of the moon's motion instrument
价格:¥0.00
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透明天球仪
The transparent celestial globe
价格:¥0.00
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