原级：mailbag
1. The Customs shall supervise the entry and exit, opening, sealing and dispatching of international mailbags.
国际邮袋出入境、开拆和封发，应当由海关监管。
2. Assist in customs clearance, despatching, collecting and delivery of diplomatic mailbags and shipments.
协助外交邮袋，外交物品的海关申报，发送和提货手续
1. From then on, sliding on the steel wire with mailbags weighing up to 30 kg became routine.