104177
If there is any place in the line where the impedance is not uniform for some reason ( open circuit , impedance discontinuity , different material ) the signal gets modified by reflection at the impedance change point which results in distortion , ringing and so forth .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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