Kev xuas tes taw nrog cov ces kaum loj

Lawv tso cai rau ntau yam ntawm cov lus tsa suab, feem ntau qhib 180 degrees lossis ntau dua. Qhov no txhais tau tias lub qhov rooj thiab hau tuaj yeem qhib tag nrho thiab tsis ua tiav, muab cov kev nkag mus tsis tau. Piv txwv li, hauv cov khoom lag luam xws li cov khoom lag luam loj lossis cov tshuab txuas ntxiv, cov pob taws no tso cai rau kev saib xyuas yooj yim thiab ua tiav thiab tshuaj xyuas. Hauv kev teeb tsa hauv tsev, ntawm lub qhov rooj pantry, lub dav dav qhib tso cai rau qhov pom kev tiav ntawm txhua yam sab hauv, ua lub koom haum thiab rov ua dua.
Thib ob, nyob rau hauv cov nqe lus ntawm kev tsim, dav lub tshuab raj nthuav tawm cov hinges ntxiv ib qho kev zoo nkauj. Lawv raug tsim qauv tsis tsuas yog qhia txog kev ua tiav engineering tom qab lawv cov kev tsim kho tom qab, tab sis kuj ua cov khoom zoo nkauj. Lawv tuaj yeem yog lub focal point rau rooj tog zaum niaj hnub lossis kev lag luam lawv dai kom zoo nkauj. Dav lub kaum sab xis dav kuj ua rau muaj kev hloov pauv tag nrho. Cov neeg tsim qauv tuaj yeem tsim ntau dua cov txheej txheem thiab cov chaw-ua tau zoo vim tias dav lub qhov rooj qhib tuaj yeem tso rau ntau txoj kev kom haum rau cov chaw khiav.
Thaum kawg, lub peev xwm yog qhov tseem ceeb ntawm lub kaum sab xis nthuav dav. Lawv tau tsim los ntawm cov ntaub ntawv zoo uas tuaj yeem tiv taus kev ntxhov siab ntawm lub zog dav dav. Seb siv nyob rau hauv ib puag ncig kev lag luam siab lossis hauv lub tsev tsis khoom, cov hinges no tuaj yeem tiv taus kev siv tsis tu ncua yam tsis poob lawv cov haujlwm. Lawv tawm tsam cov kev hnav thiab kua muag, ua kom muaj kev ua tau zoo ntev thiab kev ntseeg tau.