Cov Menyuam Roj Hmab Rau Kev Lag Luam Cov menyuam roj hmab siv rau ntau yam lub hom phiaj thiab pom muaj nyob rau hauv ntau cov txheej txheem tsim khoom. Cov kev siv yooj yim rau cov menyuam roj hmab pom muaj nyob rau hauv cov txheej txheem tsim khoom ntawm cov ntaub, zaj duab xis, daim ntawv, ntawv thiab cov hlau coiled. Cov menyuam roj hmab npog siv rau hauv txhua hom thawv thiab cov khoom siv ntim khoom nrog rau cov tshuab siv rau kev xuab thiab sib tsoo ntoo, hlau thiab txhuas.
Cov roj hmab dov lossis cov yob lag luam siv rau hauv cov ntawv thov uas xav tau kev sib cuag thiab kev sib txhuam ntau, thiab tseem siv rau hauv cov ntawv thov ua cov khoom siv uas xav tau kev kov mos mos. Cov dov feem ntau yog cov duab cylindrical lossis spherical thiab yog cov khoom siv uas dov lossis tig, zoo li piv txwv li, lub log me me uas tsis muaj spokes lossis zoo li lub log skate lossis caster. Cov dov kuj siv rau hauv kev luam ntawv. Rau lub hom phiaj luam ntawv, nws yog cov roj hmab dov uas siv los ua number case ua ntej daim ntawv raug luam tawm. Cov dov roj hmab kuj yog qhov kev xaiv zoo tshaj plaws rau kev kho kom zoo nkauj ntawm cov duab cylindrical thiab kev kho kom zoo nkauj ntawm cov chaw tiaj tus lossis nkhaus. Cov dov npog siv dav hauv kev lag luam kos duab.
Lub sijhawm tshaj tawm: Lub Yim Hli-08-2020
