Power watsa bel ne Firayim mover na mota ko engine juyawa da pulleys gudanar da bel da wani inji na'urar, an kuma yi kira da ikon band. Yana da zuciyar da connection memba na lantarki da kuma na inji kayan aiki, da fadi da kewayon abnormalities, musamman m. Daga m zuwa dama dubu kilowats na giant motor, kananan zuwa kasa da daya kilowatt micro-motor, har ma da gida kayan, kwakwalwa, yaro-, ainihin kayan ciki har da bel ne rabuwa. Its mFeatureYana da free don matsawa, watsa nesa, m tsarin, sauki maye gurbin. Saboda haka, daga m zamani atomatik inji na'urar yana bel adadi, da samfurin bayan maimaita juyin halitta da fasaha balaga.

Flat bel ne bel mafi jinsin, game da 100 shekaru na tarihi, amma har tsakiyar karni na 20th, har yanzu riqe da bel a game da rabi daga cikin kasuwa share.

Bamuda, kuma aka sani da V-bel, da bel da yake a samar, da most jinsuna, mafi yadu amfani da wani samfurin.