Gel cwj mem, luv luv rau nruab nrab number case ballpoint cwj mem, originated nyob rau hauv Nyiv thiab yog ib tug tshiab sau cuab yeej nrov nyob rau hauv East Asia. Raws li hom cwj mem, xim xim, qauv, thiab lwm yam, nws tuaj yeem muab faib ua ntau hom gel cwj mem, thiab koj tuaj yeem xaiv raws li koj tus kheej xav tau.
Gel cwjmem muaj qhov zoo ntawm ob tus cwj mem dej thiab roj- raws li cov cwj mem. Lawv muaj kev zoo siab sau ntawv, tsis tshua muaj number case viscosity, thiab lubricants tsim nyog ntxiv. Lub viscosity ntawm qhov nruab nrab sau ntawv yog nyob nruab nrab ntawm dej -raws li thiab roj-raws li, yog li nws yog smoother dua li cov roj zoo tib yam -raws li ballpoint cwjmem. Ib qho khoom kho dua tshiab ntawm cov roj- cov cwj mem ballpoint.
