Kodi pulley ndi chiyani? Pulley ndi chida chosavuta chamakina kapena makina (omwe atha kukhala matabwa, zitsulo, kapena pulasitiki) omwe amakhala ndi chingwe, chingwe, unyolo, kapena lamba wonyamulidwa pamphepete mwa gudumu. Gudumu, lomwe limatchedwanso mtolo kapena ng'oma, litha kukhala lamtundu uliwonse ...
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