503
In cases with passive hinge system , the amount of daily angular correction can easily be calculated by the geometric methods using the rule of similar triangles and the rule of concentric circles , and can be expressed as the amount of daily lengthening of motor system .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
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