How to open the old mechanical safe?

If the old safe can not open how to do, in fact, is relatively simple, there is a more suitable to open the old safe for the general mechanical code, specific use of the mechanical code to open the old safe operation:

The first situation is that if the original code is a group of four numbers: first to the left to turn the code group number of the same number of laps and aligned with the first number (01); then to the right to rotate through the first number (01) after two aligned with the second number (02); followed by the left to rotate through the second number (02); then to rotate through the second number (02); then to the left to rotate through the second number (02) Rotate through the first number (01) twice after the second number (02); then rotate to the left to turn through the second number (02) once after the third number (03); Finally, it is to the right to rotate directly to the fourth number (04) after you can open the safe.

The second case is if the original password is three groups of numbers: first to the right to turn the number of password groups of the same number of circles and aligned with the first number (01); followed by a turn to the left to turn over the first number (01) once aligned with the second number (02); followed by a turn to the right to align directly with the third number (03) to open the safe.

But it should be noted that if you turn over the current number in the whole operation, you must restart from the first part, not directly reverse, so there is no way to open the safe.