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Guidelines for Carrier Phone Systems: Installation, Maintenance, and Improvement

机译：运营商电话系统指南：安装，维护和改进

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摘要

This Bureau of Mines Handbook describes the installation and maintenance of carrier phone systems in underground coal mines. Detailed information is also presented on specific ways to improve existing carrier phone systems.

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作者
Cawley, J. C.;
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年度 1981
页码 1-77
总页数 77
原文格式 PDF
正文语种 eng
中图分类工业技术 ;
关键词
Telephone systems; Coal mines; Maintenance; Installing; Handbooks;

机译：电话系统;煤矿;维护;安装;手册;

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Guidelines for Carrier Phone Systems: Installation, Maintenance, and Improvement

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