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电话机产品质量分等标准
Grading standard for telephone
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矿用本质安全型自动电话机技术要求及试验方法
Performance requirements and test methods for intrinsically -- Safe automatic mine telephone
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电力调度通信总机技术要求
Specification on dispatching equipment for power dystem communication
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受话器测量方法
Methods of measurement for telephone receivers
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程控电话交换机电源通用规范
General specification for power supply system of SPC exchange
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火警调度总机技术条件
Specification for dispatch switchboard for fire alarm
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JXD-37型袖珍式无线电话机
Wireless portable telephone for JXD-37
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