reciprocating motion

repetitive up-and-down or back-and-forth linear motion

en-US/ɹɪˈsɪpɹəˌkeɪtɪŋ ˈmoʊʃən/
en-GB/ɹɪˈsɪpɹəkeɪtɪŋ ˈməʊʃn/

دسته بندی ها:

linear motionmotion