发现消火栓箱的玻璃松破、箱门门锁及拉手坏；
If fire hydrant boxes are found broken glass song, door locks and handles worse;
分析了敞车中侧门门锁装置的故障原因，介绍了改进措施。
The causes to troubles in side door locks on Gondola cars are analyzed. The measures for improvement are described.
在家庭应用方面，有身体验证功能的大门门锁、车库门与保险箱也已经在市场上出现。
Domestic applications, such as biometric front-door locks, garage doors and safes, are also available.
应用推荐