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Excessive eye movement, more commonly known as twitching, is often caused by strong emotions, such as fear, love, anger, or even excitement. During sleep, this phase is called rapid eye movement(REM). This is the 4th or 5th stage of sleep, depending on the individual.
Answer:
True.
Explanation:
Cylindrical roller bearing assemblies requires lubrication to cushion the rollers and races while operating because the lubrication reduces friction of metals with each other. The two metals which slide over one another needs lubrication in order to reduce friction so it also increases the life of these metal parts so it is important for cylindrical roller to lubricate to work properly.
