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载波电话设备质量分等标准 明线12路载波电话设备
Grading standard for quality of carrier telephone equipment 12 -- channel carrier telephone over equipment
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调度电话总机测试方法
Methods of measurement for dispatching telephone main stations
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调度电话总机技术要求
Technical requirements for dispatching telephone main stations
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矿用纵横制用户电话交换机技术要求
Technical requirements for iron clad crossbar subscribers telephone switchboards
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矿用纵横制用户电话交换机测试方法
Methods of measurement for iron clad crossbar subscriber's telephone switchboards
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民用小型无线电话机及其附属设备.质量检验规则
Quality inspection procdures for small-size radio telephones and their assessories for commercial use
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