平常邮件 meaning in Chinese

ordinary mail

Where there is no doorman or receptionist but only mail boxes , intercoms or door bells on the ground floor , ordinary mail items may be dropped in the mail box , and the addressee may be asked via intercom or ringing of the bell to come to the ground floor for pickup of registered mail or to pay postage due
二无法依前款规定投递、地面层未设有管理服务人员或邮件收发处而仅设置受信设备、对讲机或电铃者，平常邮件投入受信设备，挂号邮件及欠资邮件，请收件人至地面层领取或补付欠资。