In the balance, car brake pedal, sewing machine pedal, iron scissors, barber scissors, cloth scissors, guillotine, driver, fishing rod, tweezers, wrench, chopsticks, claw hammer, trolley, steel wire pliers. Among them, 1: belongs to labor-saving lever; 2 belongs to labor-saving lever; 3 class arm lever

In the balance, car brake pedal, sewing machine pedal, iron scissors, barber scissors, cloth scissors, guillotine, driver, fishing rod, tweezers, wrench, chopsticks, claw hammer, trolley, steel wire pliers. Among them, 1: belongs to labor-saving lever; 2 belongs to labor-saving lever; 3 class arm lever


Belong to the labor-saving lever: car brake pedal scissors iron scissors knife driver wrench
Claw hammer, handcart, wire pliers
The utility model belongs to a laborious lever; a sewing machine, a pedal, a hairdresser, a scissors for cutting cloth, a fishing rod and tweezers
chopsticks
Equal arm lever: balance