Xov xwm

1. Raws li txheej txheem txheej txheem yog muab faib rau: kua tshuaj kua mem kua kua mem kua kua mem kua, luam yeeb tshuaj luam yeeb, luam y...

Vijtsam tshuab luam ntawv muaj peev xwm hu ua "screen printing inks" thiab feem ntau yog siv cov npoj siv luam yeeb. Lawv yog ...

Cov lej uas siv los ua ib qho ntawm cov ntaub ntawv ntawm luam tawm ua ntej 2000 twb tau tshwm sim. Nws yog chaw lwm qhov pom ...