Vim li cas thiaj siv Hlau Dowels?

Vim li cas thiaj siv Hlau Dowels?
Dowels yog ib qho yooj yim, siv tau thiab ntau yam fastener siv nyob rau hauv ntau cov txheej txheem sib dhos. Nov yog qee qhov txiaj ntsig tseem ceeb ntawm cov hlau dowels:
Kaw tolerances muab kev rov ua dua qhov tshwm sim hauv qhov chaw tsim khoom siab
Tiv thaiv kev txav mus los ntawm cov khoom uas nyob ib sab
Tsis tas yuav tsum muaj cov khoom siv sib txuas ntxiv
Bevel / chamfer los yog tapered kawg qhia tus pin rau lub qhov
Radius xaus tiv thaiv qhov deformation thaum lub sijhawm teeb tsa