Dab tsi yog ares corp txhuas rail?

Rail: hlau los yog lwm yam ntaub ntawv ua los ntawm grooves los yog ridges, tuaj yeem ua tau, ruaj, cob qhia lub xov tooj ntawm tes lossis khoom siv thiab txo qhov kev sib txhuam ntawm ib lub cuab yeej. Longitudinal grooves los yog cov caij tsheb npoo ntawm cov ntsia hlau rau cov txheej txheem, kho qhov khoom tshuab, khoom siv tshwj xeeb, thiab cov twj paj nruag. Kev ntsia hlau, txoj hlua khi, cov hlua ncaj qha, rau cov ntaub ntawv tawm ntawm cov ntaub ntawv rov qab, muaj feem ntau dua cov khoom thauj tshaj ntawm cov kab tuav tawm, thiab nqa tau ib lub zog, thaum muaj kev kub siab ua tiav cov lus tsa suab ncaj qha Cov phau ntawv qhia kev tsheb nqaj hlau tau faib ua ob Hom kev qhia rau cov menyuam thiab kev qhia pob

Kev siv ntawm txoj kab tsheb nyob rau hauv peb lub neej txhua hnub yog ib qho tseem ceeb, xws li cov qhov rooj uas swb, khau khiab nyob rau sab nraub ntawm daim ntaub thaiv, thiab cov tsheb ciav hlau, thiab lwm yam.
Daim ntawv thov. Cov ntsia hlau tseem tuaj yeem siv rau txhua lub tshuab lossis khoom siv uas yuav tsum tau siv zawv zawg zawg, yog siv cov ntsia hlau ciav hlau.