Postal services - apertures of private letter boxes and letter plates - requirements and test methods 邮政业务.私人信箱投信口和街门前投信栏板.要求和试验方法
2.
Postal services - apertures of private letter boxes and letter plates - requirements and test methods 邮政服务业务.私人信箱和信箱投信口金属板缝隙.要求和试验方法
3.
I even paused briefly with the letter part way into the mail slot before i thrust the letter into the mailbox 甚至在信已经部分插入投信口时，还犹豫了一会儿才把它推进邮筒。
4.
Postal services - apertures of private letter boxes and letter plates - requirements and test methods ; german version en 13724 : 2002 邮政业务.私人信箱和信箱投信口金属板缝隙要求和试验
