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Kurasa screw thread tsika tube
Kuraswa kwakaraswa kwetsika tubes kwakakosha zvishandiso zvechero zvinyorwa zvechirongwa mumatare emarabhoritari. Ivo vanotora dhizaini rakachengeteka rakachengetedzwa kuti vadzivise kusvibiswa uye kusvibiswa, uye zvakagadzirwa nezvinhu zvinobhadharwa kuti zvisangane zvinodiwa pakushandisa.
