Lub thawv ntim khoom siv pov tseg 2G uas nyiam tshaj plaws

Cov thawv ntim khoom uas muaj hlau nplaum yog cov thawv sab nraud uas tsim tshwj xeeb rau kev khaws cia thiab tiv thaiv cov luam yeeb hluav taws xob lossis cov thawv ntim khoom. Muaj lub zog kaw uas muaj hlau nplaum, cov thawv no siv lub zog nqus ntawm cov hlau nplaum rau kev qhib/kaw du thiab yooj yim, ua kom lub foob kaw ruaj khov uas tiv thaiv cov khoom sab hauv kom tsis txhob plam tawm thiab tiv thaiv lawv ntawm kev cuam tshuam sab nraud, plua plav, thiab lwm yam kuab paug. Hais txog cov ntaub ntawv, lawv feem ntau siv cov ntawv cardboard tawv, yas, lossis - rau cov qauv zoo tshaj plaws - cov ntaub mos mos los muab kev tiv thaiv zoo rau cov khoom.

Hais txog qhov tsos, cov thawv ntim khoom uas muaj hlau nplaum txhawb nqa kev hloov kho kom haum rau ntau yam: cov cim lag luam, cov ntaub ntawv khoom, thiab cov qauv tshwj xeeb tuaj yeem pom los ntawm kev luam ntawv, kev kub stamping, embossing, thiab lwm yam txheej txheem. Qhov no tsis yog tsuas yog tiv thaiv cov khoom xwb tab sis kuj txhim kho cov duab hom thiab kev nyiam pom, txhawb kev sib tw ua lag luam.

Cov thoob ntim khoom uas khoob yog cov thawv rau khaws cov kua e-kua. Feem ntau yog ua los ntawm cov yas lossis hlau uas zoo rau khoom noj, lawv muab kev sib khi zoo heev los tiv thaiv cov kua e-kua kom tsis txhob xau. Muaj ntau yam kev qhia txog qhov loj me (feem ntau yog 1g txog 5g), lawv ua tau raws li cov neeg siv xav tau sib txawv. Cov thoob ntim khoom uas khoob muaj ntau yam qauv: qee qhov muaj qhov ntsaws-thiab-ua si kom yooj yim rau kev ntim khoom tus kheej, thaum lwm tus muaj qhov chaw ntim khoom rau kev siv nrog cov cuab yeej tshwj xeeb, ua kom yooj yim thiab yooj yim rau kev siv. Ua cov khoom siv rov qab tau, lawv tsis tsuas yog txo cov nqi siv xwb tab sis kuj txhawb kev ruaj khov ntawm ib puag ncig.