switch lock造句

Officials investigating the accident said Friday that a railway switch lock was not in its proper position when the cars derailed.
In 1908, Adams & Westlake patented a stamped & riveted switch lock that was so economical that many railroads stopped using the popular cast hearts and went with this new stamped shell lock body design.
The Traffic Maintenance and Administration System ( TMAS ) enables RAPID to perform and control the protection switch lock-out process on protection channels being used for restoration, by sending commands to the Line Terminating Equipment ( LTE ).
It's difficult to find switch lock in a sentence. 用switch lock造句挺难的