Washku inta badan waa bir ama caag.Kala-goysyada xiran ee tayada sare leh waxay u baahan yihiin dhaqdhaqaajiyaal adag oo bir ah si ay uga hortagaan luminta rarka hore ee brinelling ka dib marka qulqulka la mariyo.Mashiinnada wax lagu dhaqo ayaa sidoo kale muhiim u ah ka hortagga daxalka galvanic, gaar ahaan iyaga oo ka dahaadhinaya boolaladaha birta ee dusha sare ee aluminium.Waxa kale oo laga yaabaa in loo isticmaalo codsiyada wareegta ah, sida xajin.Dhaqdhaqaaqa tuubada ayaa la isticmaalaa marka aan loo baahnayn qaadashada curiyaha wareega ama dhinaca kharashka-waxqabadka ama xannibaadda booska awgeed.Dahaarka waxa loo isticmaali karaa in lagu yareeyo xidhashada iyo is jiid jiidka, ha ahaato in la adkeeyo oogada ama iyada oo la siinayo saliid adag (sida dusha is-saliimaysa).
Asal ahaan erayga lama garanayo;Isticmaalkii ugu horreeyay ee la diiwaan geliyo ee ereyga wuxuu ahaa 1346, si kastaba ha ahaatee, markii ugu horreysay ee qeexiddiisa la diiwaangeliyay waxay ahayd 1611.
Gaasaska caagga ah ama fiber-ka loo isticmaalo qasabadaha (ama tubooyinka, ama valves) sida shaabad ka soo horjeeda daadinta biyaha ayaa mararka qaarkood loogu yeeraa hadal ahaan sida weel;laakiin, in kasta oo ay u ekaan karaan isku mid, dhaqayaasha iyo gaasaska waxaa inta badan loogu talagalay hawlo kala duwan oo loo sameeyay si ka duwan.
Dhaqdhaqaaqyada intooda badan waxaa loo qaybin karaa saddex nooc oo waaweyn;
Mashiinnada caadiga ah, kuwaas oo faafiya rarka, kana hortagaya burburka dusha sare ee la hagaajiyo, ama bixiya nooc ka mid ah dahaarka sida koronto
Dhaqayaasha guga, kuwaas oo leh dabacsanaan xagal ah oo loo isticmaalo si looga hortago xirashada ama dabacsanaanta gariirka awgeed
Mashiinnada qufulka, kuwaas oo ka hortagaya in la xidho ama furmo iyaga oo ka hortagaya wareejinta qalabka wax lagu xidho;Mashiinnada qufulka sida caadiga ah sidoo kale waa weelasha guga.
