Qee zaum, qhov yooj yim tshaj plaws inventions yog qhov tseem ceeb. Txawm hais tias peb tsis paub txog leej twg yog tus tsim lub log casters, txawm li cas los xij, cov ntaub ntawv ntawm cov casters tuaj yeem sau hnub tim 5500 xyoo dhau los. Cov neeg yuav tsum thawb cov khoom tawv heev thiab tawv ua ntej muaj log. Muaj ib hnub, tib neeg tau pom kev los ntawm cov pob zeb slick dov los ntawm sab saum toj mus rau ko taw ntawm lub roob, yog li ntawd peb muaj ib lub tswv yim los tsim lub log caster.
Caster tsim kiv puag ncig uas tib neeg tsis' tsis tas yuav nqa ib qho khoom mus rau lwm yam khoom los ntawm tes. Peb muaj tsheb kauj vab, tsheb, tsheb ciav hlau thiab trolleybus tsuas yog vim muaj kev cuam tshuam ntawm lub log caster.
Caster wheel is widely used in many areas , there is no doubt that we all need it . According to the development of the caster , it has 150,000 different types at least caster we are using at present . It indeed created a more convenient , efficient and safe labor life for every one of us .
