YY5-77型包裹收寄机是供邮政营业收寄国内包裹的一种专用设备,具有秤重、计算资费和打印收据三种性能。该机分三个部分:(1)字盘秤、(2)电路控制箱、(3)键盘打印,其控制部分主要采用继电器电路。包裹收寄机早自1966年就开始研究试制,后经过不断改进提高,现已制出第四代样机,并在各邮局普遍安装使用。该机能提高工作效 YY5-77 parcel sending and receiving machine is used for postal business to send a parcel of domestic equipment, a special equipment, weighing, calculating the cost and print receipts of three properties. The machine is divided into three parts: (1) dial scale, (2) circuit control box, (3) keyboard printing, the control part of the main relay circuit. As early as 1966, the parcel receiving and sending machine started to study the trial production, and after continuous improvement and improvement, the fourth generation prototype has been made and widely used at all post offices. The machine can improve work efficiency