Cov khoom siv ntawm honed tube

cov yam ntxwv ntawm cov khoom siv

txhua yam khoom siv hauv kev tsim khoom Cov Yeeb Nkab Honeds coj cov txiaj ntsig sib txawv:

c20: cov hlau uas tsis muaj carbon ntau, c20 muaj nqis rau nws txoj kev ua haujlwm zoo thiab kev vuam zoo, ua rau nws yog qhov kev xaiv nrov rau ntau yam kev siv qauv.
  
e355 (st52): paub txog nws qhov kev ua tau zoo heev thiab lub zog muaj zog, e355 feem ntau siv rau hauv kev tsim cov tshuab hnyav thiab cov khoom siv vim nws muaj peev xwm tiv taus cov xwm txheej ua haujlwm hnyav.
  
sae1026: cov hlau carbon nruab nrab no muaj kev tiv thaiv zoo thiab feem ntau siv rau hauv kev lag luam tsheb, tshwj xeeb tshaj yog rau cov khoom siv uas xav tau lub zog siab.
  
4140: paub zoo txog nws qhov kev tawv thiab lub zog siab, 4140 zoo meej rau cov ntawv thov uas xav tau kev tawv, xws li cov iav, cov ncej, thiab cov khoom siv.
  
stkm13c: ib lub yeeb nkab tsis muaj qhov txias, stkm13c tau txais kev qhuas heev rau nws qhov ntev thiab cov khoom siv kho tshuab siab, ua rau nws zoo tagnrho rau kev siv precision.