Tshaj Tawm yog qhov feem pua ntawm qhov sib kis ntawm qhov teeb meem ntawm lub kaum sab xis ntawm 2.5 ° ntawm qhov xwm ntawm lub teeb rau cov kev sib kis kab mob sib kis, uas yog ib qhov tseem ceeb ntawm cov khoom siv rau cov ntaub ntawv pob tshab los sis cov ntsiab lus. Tshaj siab ntau dua qhov lub tsho txhais tau hais tias lub ntsiab ntawm cov yeeb yaj kiab thiab cov koob meej, tshwj xeeb tshaj yog cov duab ntawm cov duab tsim, txo qis. Lub qhov nrob qaum lossis pom ntawm qhov txawv ntawm sab hauv los yog ntu ntawm cov khoom pob tshab los yog cov ntsiab lus ntawm lub teeb nrig.
Cov khoom uas muaj lub dav hlau muaj peev xwm muaj peev xwm hloov tau yooj yim. Yog tias zoo li cov khoom siv los ua qhov iav qhov rai, chav tsev yuav ci ntsa iab thaum nruab hnub, tiam sis nws yog zais; yog tias nws yog ib lub tsheb caws pliav, nws yog ib qho tseem ceeb uas yuav tsum muaj ob qho zoo kom nws thiaj li muaj cai.
Muaj ob qho tseem ceeb uas muaj feem xyuam rau cov nplaum yas ntawm cov yeeb yaj kiab: thawj zaug, cov ntaub ntawv raw, xws li cov khoom siv tshuaj, cov khoom tsis muaj thiab cov khoom ntxiv; ob, kev ua haujlwm, xws li kev ua haujlwm sib txawv, sib txawv kev ua hauv qab tib lub tshuab ua haujlwm.
Cov ris tsho muaj feem xyuam nrog qhov sib npaug, thiab qhov siab tshaj qhov ci ntsa iab, txo cov taws. Constant AG lub khob npuas yuav ua tau 1 ° -40 °
Lub iav los ntawm lub khob iav ntsuas yog lub ntsuas cua, uas yog muab tso rau ntawm qhov chaw nres nkoj paub thiab clamped smoothly.
