大连机车、四方车辆、戚墅堰机车车辆工艺、株洲电力机车研究所，西安通信器材研究所，通号设计院，二七通信厂科研所，武汉工程机械研究所，电化局，经规院，劳卫所，标准所，铁科院：现将编制2003年铁道行业标准制修订计划的有关事项通知如下：一、　编制原则1．制修订标准要 Dalian Locomotive, Sifang vehicles, Qishuyan locomotive and rolling stock technology, Zhuzhou Electric Locomotive Research Institute, Xi’an Institute of communications equipment, through the design institute, communication plant 27 Institute of Science and Technology, Wuhan Institute of Engineering Machinery, Institute of Standards, CASS: We hereby notify you of the relevant matters concerning the revision of the railway industry standard system revision plan for 2003 as follows: I. Principle 1. System revision standards to be