Lub tshuab rov ua ntawv so quav yog ib qho ntawm cov khoom siv tseem ceeb tshaj plaws hauv cov tshuab ua ntawv so quav. Nws lub luag haujlwm tseem ceeb yog rov ua cov ntawv so quav loj (piv txwv li cov ntawv so quav nyoos uas yuav los ntawm cov chaw ua ntawv) mus rau hauv cov ntawv so quav me me uas tsim nyog rau cov neeg siv khoom siv.
Lub tshuab rewinding tuaj yeem kho cov kev teeb tsa xws li qhov ntev thiab qhov nruj ntawm rewinding raws li qhov xav tau, thiab qee lub tshuab rewinding siab heev kuj muaj cov haujlwm xws li kev nplaum tsis siv neeg, xuas nrig ntaus, embossing, thiab lwm yam, kom ua rau kom zoo nkauj thiab siv tau ntawm daim ntawv so quav. Piv txwv li, lub tshuab rewinding ntawv so quav xyoo 1880 yog qhov tsim nyog dua rau cov chaw ua haujlwm hauv tsev neeg lossis cov chaw ua ntawv so quav me me. Nws cov ntawv nyoos ua tiav yog qhov tsim nyog rau daim ntawv loj axis qis dua 2.2 meters, nrog qib siab ntawm kev ua haujlwm tsis siv neeg, uas tuaj yeem txuag cov nqi zog ua haujlwm.
Lub sijhawm tshaj tawm: Lub Kaum Hli-23-2024