UV Marble Sheet

UV Board yog qhov zoo tshaj plaws hloov pauv rau cov txheej txheem phab ntsa, -- qhov ua ntej suav nrog: Lub teeb yuag, yooj yim rau kev thauj mus los --High resistant rau ya raws thiab pwm-- Yooj yim rau tu, ceev thiab yooj yim rau nruab{ {3}}Kev tiv thaiv dej, hluav taws kub,--Vim li cas ntawm cov xim thiab tsim