一、北郊站货票减联的成因及其基础工作“货票”作为全国铁路范围货运经营业务凭证，长期来统一于甲、乙、丙、丁四联模式，即站在联、上报联、发票联、到站联。由于其版由校大，且需保存多年，故造成印制成本高、营理复杂、堆放空间大、查阅困难警许多不利因素，且提高了铁路 First, the North Sub-station ticket deduction causes and basic work “Ticket” as a national railway freight business credentials, for a long time to unify in A, B, C, D quadruple mode, that is standing in the United, reporting Union, the invoice United, to the station joint. Due to its version by the school, and need to be preserved for many years, resulting in high printing costs, complex management, stacking space, access to difficult and polluted many unfavorable factors, and improve the railway