The money to learn unlocking technology is only equivalent to one month's salary of an ordinary worker. Learning unlocking technology will benefit you for life. As long as you manage with your heart, you can survive in this industry for a long time.

1, unlocking principle: each lock has a different structure, which determines its different functions. As for the unlocking principle, the unlocking principle of most locks is the same, except for some locks such as magnetic card locks and electronic locks.

2. Door locks, door locks, cross locks, etc. Although they are different in style, structure and size, the principle of unlocking is exactly the same. As the saying goes: "From its ancestors, it will never change!" The unlocking principle of these locks is exactly the same, mainly because their locks are round objects. Anyone who has studied physics knows that only circular objects can rotate freely. Squares and planes are objects that cannot be rotated at will.