1. Txhawm rau txhim kho lub zog ntawm cov ntawv hlau ntev ntev, cov hlua khi yuav tsum tau tsim.
2. Kev khoov ntxiv ntawm lub ces kaum ntawm qhov khoov tuaj yeem ntxiv dag zog rau cov tav.
3. Stiffener
Nias ribs ntawm daim hlau qhov chaw yog pab tau kom cov txheej txheem rigidity. Saib lub rooj rau cov qauv stiffener thiab nws qhov kev xaiv loj.
4. Txwv qhov ntev ntawm convex spacing thiab convex margin
Qhov txwv qhov loj me ntawm qhov sib txawv ntawm qhov sib txawv thiab qhov sib txawv ntawm qhov convex ntug yuav tsum raug xaiv raws li cov lus hauv qab no.
5. Louver
Louver feem ntau yog siv rau qhov cua thiab cua kub dissipation ntawm ntau yam ntaub ntawv los yog casings. Nws txoj kev tsim yog txiav cov khoom los ntawm ib tug ntug ntawm lub punch, thaum tus so ntawm lub punch ib txhij stretches thiab deforms cov khoom los tsim ib tug undulating zoo ntawm ib tug qhib.
Xa mus rau daim duab rau cov qauv ntawm lub louver.
Louver qhov yuav tsum tau muaj: ntau dua lossis sib npaug rau 4t; b Ntau dua lossis sib npaug li 6t; h Tsawg dua lossis sib npaug li 5t; L Ntau dua lossis sib npaug li 24t; r Ntau dua lossis sib npaug rau 0.5t.