Hedge Shear

Hedge Shear

(1) cut the branches, with the scissors mouth in the middle, without scissors, reducing the resistance of the arm, in the resistance, power arm certain circumstances, according to the balance of the balance to know the power, more effort;
(2) labor-saving and laborious lever is based on the power arm and arm of the length of the arm, that is, the power arm is the effort to force the lever; power arm short is the laborious lever; power arm and resistance arm equal arm lever;