machal jeondong jangchi
friction gearing
engrenage à friction ; transmission à friction
마찰 전동 장치는 기계의 효율성을 높이는 데 사용됩니다.
machal jeondong jangchi-neun gige-ui hyoyulseong-eul nopineun de sayongdoemnida.
Friction gearing is used to increase the efficiency of machines.
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