信箱锁 meaning in English

mailbox lock

Provision of lock and aperture flap , enhancing mail security
具有信箱锁及有盖入信口，增强邮件的安全性
During the ceremony , mrs . choi also introduced for the first time a standard a4 - size letter box with an address plate to the public . featured with an anti - theft device at the aperture that can be locked , the new letter box serves the dual purposes of speedier delivery of mail and reduced risk of mail theft
在仪式上，蔡太亦首次介绍一个标准规格的信箱。该信箱的设计特色是在信件入口处设有防盗装置，并配备信箱锁和地址格，可放入a4尺寸的信件，方便邮差更快捷、更稳妥地投送邮件。