The invention from the song dynasty that improved clocks was: The clock tower/clepsydra clock
This invention is the first type of clock that utilized the <em>escapement mechanism </em> that is applied by many European countries around 2 centuries later to produce their clocks.
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Sociology has a unique place among all the social sciences. It is different from other social sciences due to its unique nature. Sociology is considered as an independent and separate field of study.
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Communism (from Latin communis, 'common, universal') is a philosophical, social, political, economic ideology and movement whose ultimate goal is the establishment of a communist society, namely a socioeconomic order structured upon the ideas of common ownership of the means of production and the absence of social ...
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During World War II, Jewish resistance fighters launched attacks, created underground networks, led rescue missions
When a nut or bolt is extremely tight, a lubricant is used so that the teeth in the ratchet head are not damaged.
<h3>What is a lubricant?</h3>
A lubricant refers to the oil that is applied on the metal parts of objects to prevent rusting or damage. A good ratchet is often identified by the number of teeth it has and since its parts are metallic in nature, it is vital that they are regularly lubricated to keep them in shape.
Sometimes, the ratchet can also be degreased during maintenance. The problem that most ratchets tend to have stem from torquing excessively.
Learn more about lubrication here:
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