What are the principles and the methods of use of pliers?
Use of tongsThe pliers have screw at the back. This screw can adjust the opening of the pliers, and adjust the mouth of the pliers to the proper width. Then it can be closed.
Working principle of tongsThe tongs mainly use the lever principle and belong to the manual tools of lever force increasing. The key of the work is that when the angle of a set of mandril is big, the force can be gained several times from the decomposition of force. Compared with other manual tools which use lever principle, the application principle of lever is applied two times, so it is more labor-saving.
