Standard for quality inspection and evaluation of pertoleum construction engineering telecommunication engineering toll open - wire line engineering 石油建设工程质量检验评定标准通信工程长途通信明线线路工程
4.
Standard for quality inspection and evaluation of petroleum construction engineering . telecommunication engineering toll open - wire line engineering 石油建设工程质量检验评定标准.通信工程长途通信明线线路工程