O-rings yog cov nplhaib roj hmab sib khi nrog cov ncig sib luag. Vim tias tus ntoo khaub lig-tshooj yog O-puab, lawv hu ua O-rings, tseem hu ua O-rings. Nws pib tshwm sim li ntawm nruab nrab ntawm xyoo pua puv 19, thaum nws tau siv los ua lub caij sib khi rau chav tshuab lub tog raj kheej.
Vim tias nws tus nqi qis, kev tsim khoom yooj yim, kev ua haujlwm zoo, thiab yooj yim kev teeb tsa, O-rings yog cov qauv siv tshuab tshaj plaws rau kev sib khi. O-nplhaib Dais tus lub siab ntawm kaum tawm lab tus ntiv taw (txhiab phaus). O-rings tuaj yeem siv rau hauv cov ntawv thov zoo li qub thiab nyob rau hauv cov ntawv thov dynamic qhov twg muaj kev sib txheeb ntawm cov khoom sib txuas, xws li tus ncej ntawm lub twj tso kua mis teb thiab lub piston ntawm lub tog raj kheej hydraulic.
