| 摘要 |
A security locking device comprising two units, each unit comprising two chains secured to a plate by a U-shaped bar. The ends of the bar are set in holes in the plate and hammered flat; and a plurality of screws secure the plate to a wall or door. The heads of these screws are ground flush with the plate and spot-welded thereto. A padlock secures the ends of the chains.
|
