The term saw has different notions, one of which refers to a tool used to cut objects such as wood, this utensil is characterized by presenting a serrated steel blade, which is supported by a handle or handle. The saw can be operated manually (operated by hands) or it can be operated by means of a power source (steam or electricity). Regarding the teeth, three classes can be appreciated: the universal, which is characterized by having pointed teeth, with positive and negative angles that are interspersed. The North American, which alternates his teeth as follows: three straight teeth and one concave. And the Japanese, which has teeth of different sizes inserted, with a recess on the external faces of the blade.
There is another instrument called a chainsaw, which is composed of a series of teeth, which come into operation when they are activated by means of a motor, it should be noted that in some horror films, the chainsaw has been the main instrument of the murderer of the film. The “Friday the 13th” saga and the “Texas Chainsaw Massacre” are some of them.
On the other hand, as a curious fact in Europe the saw was used as an instrument of torture and death, the same happened in France where some used the saws to destroy witches.
Another concept of sierra is one that refers to a subset of mountains that form a range. Its dimensions exceed a hundred kilometers. Within a mountain range there may be some massifs, which are distinguished by the same group of peaks, with a much higher altitude than the rest of the mountains.
