A lever operates through a rigid bar that pivots around a fixed point, providing a mechanical advantage to move or lift loads. Screws are cylindrical or conical metal pieces with helical projections, used to fasten objects together, typically involving a slot for a screwdriver.
Piece of wood or metal finished at an acute angle that is inserted between two elements or in a crack or groove and is used mainly to immobilize or firm a body.
"the assemblies of the wood were built to the top, that is, joined by nails as much to the box and spike, between the fronts and the sides, reinforcing them with wedges, which made them disassemblable"
SCREW
Cylindrical or conical metallic piece, with a helical projection that runs it totally or partially and a head with a slot to lodge the blade of the screwdriver, which serves to hold one thing to another.
FLAT
surface, terrain] That has the same level in all its parts.
PULLEY
Mechanism to move or lift heavy things that consists of a suspended wheel, which rotates around an axis, with a channel or throat at its edge where a string or string is passed.
AXIS
Cylindrical bar that crosses a rotating body and serves as a center for touring
LEVER
A lever consists of a rigid bar that rotates (rotates) around a fixed point,
