Yuav ua li cas siv looj bolts, cov ntsiab lus tseem ceeb kom paub nws cov qauv tseem ceeb, nthuav cov ntsia thawv yog tsau siv cov gradient ntawm gradient kom cov expansion ntawm kev sib txhuam, kom ua tiav cov nyom seem, peb feem ntau siv cov screws expansion muab faib ua ob hom hlau thiab yas, thiab nws txoj kev siv raws li tus qauv ntawm cov ntsia thawv kom ua rau qhov sib xyaw, ces qhov expansion ntsia hlau rau hauv qhov kev ua kom pom tseeb yav tom ntej yuav ua si zoo tom qab qhib lub luag haujlwm. Ib sab ntawm lub viav voos loj yog xov-zoo li, sab nraud yog nrog ib tug taper.
Kev nthuav dav ntawm cov txheej hauv sab nrauv yog qhwv hauv cov hlau, thiab qee expansion screws yog qhwv nrog steel yeeb nkab, hlau cylinders nyob rau hauv ib nrab ntawm incision, ces lawv yog tag nrho rau hauv phab ntsa ua ntej ua qhov chaw, siv Lub txiv ntoo yog xauv thiab lub txiv ntoo rub tawm lub hau tawm ntawm txoj kev. Rub lub tog raj sab nrig rau hauv cov hlau kheej, thiab thaum lub hlau kheej kheej nplawm, nws tuaj yeem muab teem rau ntawm phab ntsa. Cov kev screws no Siv cov khoom siv ua laj kab, huab cua txias, thiab lwm yam cib, pob zeb thiab lwm yam khoom siv sab saud. Kev nthuav dav hlau ntsia hlau loj thiab cov raj txuas sab nraud thiab lwm qhov ntawm txhua tus, hauv qab ntawm cov ntsia hlau uas qhia txog ib qho zoo li lub khob khoob khis, lub khob sab nraud ntawm lub taub hau ntawm lub raj xa dej kom loj dua, cov txiv ntsej muag yog nruj heev thaum lub hau ntswj txav, hauv kev ua haujlwm ntawm qhov xov los ntawm ib sab kom tawm mus qhib, kom qhov kev nthuav dav tuaj yeem ua rau sab nraud ntawm qhov kev tawm siab loj heev, nrog lawv cov kev sib txhuam tau ua si tau cov nyhuv.
