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This metal clamp is used for many things like holding small things like nuts or bending wires.

It has two arms crossed and articulated by an axis and with strong points.
Manuel Vázquez Ramos

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The watches are used since ancient times and as the technology of their manufacture has evolved new models have appeared with greater precision, better performance and presentation and lower manufacturing cost. Its operation is due to gears and mechanisms that make the clock hands. The gears are divided into three parts
1 Three gears are responsible for accumulating the energy to send them later to another gear
2 Three other gears turn due to the energy transmitted by the first three gears
3 The last two gears cause the hands of the clock to rotate properly as a pause of 1 second for each movement

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It is a mechanism that transforms movement. Consists of a projection that is inserted into the base of the plate of the bottle as a wedge and a handle with which a lever action is exerted to remove it.

MARTA SEVILLA TORRES

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The corkscrew is a mechanism of transformation of the movement of which is pinion - zipper. It's a pinion or a cogwheel with straight teeth., crimped to a zipper, that is to say, a belt or toothed bar. When the gear wheel rotates, the zipper moves with rectilinear movement.
By: David López Ortega.

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DESCRIPTIONS:The pruning sheras are used to cut not very fat branches that are at low height. 

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DESCRIPTIONS:The pruning sheras are used to cut not very fat branches that are at low height. 

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LEVER LEVELS:The lever is a first grade.

The first genre is when the fulcrum is a found between resistance and the force .In the prunning shears the resistance is the blades,the fulcrum in the midadle screw.
By Juan Alberto Ruiz Ramos

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-types of lever: the tweezers is of third gender

-third gender: the point of support is at one end, the resistance is at the extreme end, and it is the power that lies between

-description: the tweezers are used to pick up objects, but they are especially used to catch food such as: sweets, cut tomatoes, cut lettuce, striped cheese
by: WALID BEN BRAHIM

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The bicycle chain is a gear mechanism that has a chain, has two wheels with teeth and turns at the same time, making the force that we make on the pedals go to the wheel that makes the two wheels turn, and thus we get that can be mounted on it.

A little bit of this information has been given to me by my father.
by:JUAN MIGUEL MARTÍNEZ LÓPEZ.

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In a vaulted structure we use arches and vaults providing free spaces inside, vaults and arches are composed by voussoirs, we use voussoirs to bear the tensions called push
Daniel López Martín

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The chainsaw is a mechanism .It is designed to transmit and transform forces and movements from a motor element to a receiving .It allows the human being  to perform certain tasks with greater confort and less effort .
JUAN JOSÉ  GUILLÉN  GARCÍA

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Description: The construction crane it is used for the works.

Type of lever: The construction crane is of first genre.

-First genre: The point of support of the crane is between the resistance and the power.
-A crane is a machine designed to lift and distribute loads in space suspended from a hook.
Ibrahim ouboumalne bourti.

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Description: The nail clipper is used to cut the nails.
Type of lever: It has two types of lever are first genre and third genre.

—First genre: The first genre is when the fulcrum (point of support) is found between the resistance and the force. In the nail clipper would in the handle (upper part).
—Third genre: The third genre is when the fulcrum is found at one extreme, the resistance in the other extreme and the force between both. In the nail clipper would in the cutting sheets the resistance, the force is where we make the force and fulcrum at the end.
Aroa Martín González

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In this photo we can see a pair of scissors that is an example of first degree lever.
Mechanisms; They are those that allow the movement of objects. They are elements designed to transmit and transform forces and movements of a motor element to a receiving element.
Lever: it is in equilibrium when the product of the force due to its distance from the point of support is equal to the product of the resistance due to its distance from the point of support.
Lorena Prados Castillejo

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1. Tensile: In this image you see a stretched bracelet

2. Compressive: In this image you see a stopper crushed

3. Flexural: In this image you see a flexed paper

4. Torsional: In this image it looks like a shirt os crooked

5. Cutting: In this image you see how the paper os cut on one side from above and on the other side from below

Erika González paredes

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In this picture we can see a sweet pressing machine. It used formely for make cakes. This machine is exposed in a famous cakes shop sin seville.
Clara Rodríguez Gadea.

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Traction: is when an elements is stretched as for example: elástic.
Compression: it is the opposite of traction when an object that you tried to Crush or compress, such as a cloud of sugar or the legs of a chair.
Flexion: is when, for example the
shelves  when the books that weigh tend to bend and also flexion has efforts the traction and compression.  Torsion: is when you twist an object as for example sponge.

Maite Escobosa López