Historical origin of buckle

The history of the hasp lock dates back to the Second World War. Germany's strategic intent was to expand to the world. In order to achieve this goal, Germany's military reserve needs a lot of transportation and use. Huge machinery transportation requires a large number of boxes. Of course, the boxes need to be installed with a lock that is convenient and fast and can be opened/closed repeatedly, and at the same time, the safety is very stable. At this time, an unknown mechanical accessory was born. --The invention of hasp locks has promoted the progress of mankind. From military use to aerospace, shipping, medical technology, and people's livelihood, the hasp lock has played an indescribable role.