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LED显示屏通用规范
Generic specification for LED panels
价格:¥0.00
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光学标记阅读机通用规范
Generic specification for optical mark reader
价格:¥0.00
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计算机用数字化仪通用技术条件
General specification of digitizers for computer
价格:¥0.00
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数字电子计算机用阴极射线管显示终端质量分等标准
价格:¥0.00
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数字电子计算机用阴极射线管显示器质量分等标准
价格:¥0.00
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串行击打式点阵打印机质量分等标准
价格:¥0.00
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