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程控用户自动电话交换机质量分等标准
Grading standard for stored program control private automatic telephone branch exchange quality
价格：￥0.00
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载波电话设备质量分等标准 小同轴电缆120路载波电话设备
Grading standard for quality of carrier telephone equipment 120 -- channel carrier telephone small core coaxial Cable equipment
价格：￥0.00
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载波电话设备质量分等标准 明线高频3路载波电话设备
Grading standard for quality of carrier telephone equipment Open wire high band 3-channel carrier telephone equipment
价格：￥0.00
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载波电话设备质量分等标准 120路海底同轴电缆载波电话设备
Grading standard for quality of carrier telephone equipment 120 -- channel carrier telephone submarine coaxial cable equipment
价格：￥0.00
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载波电话设备质量分等标准 24路海底同轴电缆载波电话设备
Grading standard for quality of carrier telephone equipment 24 -- channel carrier telephone submarine coaxial cable equipment
价格：￥0.00
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载波电话设备质量分等标准 地缆12路载波电话设备
Grading standard for quality of carrier telephone equipment 12 -- channel carrier telephone underground cable equipment
价格：￥0.00
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长途人工电话交换设备 测试方法
Methods of test for toll manual telephone switching equipment
价格：￥0.00
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长途人工电话交换设备 技术要求
Technical requirements for toll manual switching equipment
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纵横制用户交换机安装验收规则
Installation and acceptance criteria of crossbar customer switchboard sets
价格：￥0.00
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载波电话设备质量分等标准 明线高12路载波电话设备
Grading standard for quality of carrier telephone equipment Open wire high band 12 channel carrier telephone equipment
价格：￥0.00
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