1. Kev saib xyuas cov khoom siv ua si tawv nplaum
Cov khoom siv no feem ntau suav nrog pob tawb, ncaws pob, siv txoj siv sia, thiab lwm yam, nrog rau ntau, siv dav thiab siv tau ntau. Qhov tsis zoo ntawm cov khoom siv tawv colloid yog yooj yim hnav, kev ua haujlwm tsis zoo, yooj yim noo noo thiab tawg. Yog li ntawd, thaum siv, cov tub ntxhais kawm yuav tsum tau qhia kom tsis txhob zaum thiab nias, tiv thaiv cov khoom ntse los ntawm kev txiav thiab chob, khaws cov khoom kom qhuav, thiab tsis txhob siv nws thaum huab cua los nag. Thaum khaws cia, nws yuav tsum muab tso rau hauv qhov chaw khoob, cua nkag thiab pob tshab, thiab nws raug txwv tsis pub nias cov khoom hnyav.
2. Kev saib xyuas cov khoom siv ua si hlau
Muaj ntau hom khoom siv hlau uas siv dav, xws li rab phom tua, rab hmuv, rab pib, rab phom pib, rab ntsuas hlau, thiab lwm yam. Hom khoom siv no yoo raug dej noo, xeb thiab xeb heev. Yog li ntawd, yuav tsum ua kom nws qhov chaw qhuav thiab huv, tshwj xeeb tshaj yog cov khoom siv uas muab tso rau sab nraum zoov ntev, xws li lub thav pob basketball, lub thav qhov rooj football, ib lub thiab ib lub pas nrig sib luag, lub tawb discus, thiab lwm yam. Cov khoom siv hauv tsev yuav tsum muab tso rau ntawm lub phaj hauv qab lossis lub txee tshwj xeeb, thiab yuav tsum so kom huv si raws sijhawm. Cov khoom siv uas tsis siv ntev yuav tsum tau roj thiab khaws cia kom zoo. Cov khoom siv sab nraum zoov yuav tsum tau ntxuav xeb tas li thiab pleev xim nrog cov xim tiv thaiv xeb. Cov khoom txuas nrog cov ntsia hlau yuav tsum tau roj tas li kom lawv du. Cov khoom siv hlau feem ntau zoo, tawg yooj yim thiab txaus ntshai thaum siv. Yog li ntawd, yuav tsum tau ua kom muaj kev nyab xeeb. Yog tias muaj kev tawg lossis puas tsuaj, yuav tsum tau vuam thiab txhawb nqa raws sijhawm kom ntseeg tau tias siv tau zoo.
3. Kev saib xyuas cov khoom siv ua si ntoo
Cov khoom siv tseem ceeb feem ntau yog lub springboard, lub thawv khiav, lub dhia ntoo siab, baton, lub thav duab barbell, lub rooj zaum toeboard, thiab lwm yam. Cov khoom siv no yooj yim hlawv, yooj yim ntub, yooj yim quav thiab yooj yim deform. Yog li ntawd, nws yuav tsum khaws cia kom deb ntawm lub zog fais fab thiab dej kom tiv thaiv hluav taws thiab dej noo. Tsis txhob raug ntaus lossis poob thaum siv, thiab pleev xim tsis tu ncua.
4. Kev saib xyuas cov khoom siv ua si fiber
Cov khoom siv no feem ntau yog siv rau rub-of-war rope, khaub ncaws, football net, volleyball net, sponge lev, chij thiab lwm yam. Qhov tsis zoo tseem ceeb yog nws yooj yim hlawv thiab yooj yim ntub. Thaum kho, peb yuav tsum tau them sai sai rau kev tiv thaiv hluav taws, tiv thaiv dej noo thiab tiv thaiv pwm. Nws yuav tsum tau ntxuav raws sijhawm thiab ziab tsis tu ncua kom khaws cia.
Lub sijhawm tshaj tawm: Tsib Hlis-19-2022