Kuaj cov ntawv lo rau Hollow hlau qhov rooj

Txhua lub qhov rooj hluav taws thiab cov thav duab yuav tsum suav nrog cov ntawv sau uas lawv tau pom txhua qhov kev xeem. Daim ntawv lo yuav tsum muab daim ntawv pov thawj ua pov thawj los ntawm ib lub chaw kuaj pom zoo, thiab cov sim hauv qab, thiab tej zaum yuav yog embossed lossis mechanically ceev. Cov ntawv lo yuav tsum tau qhia qhov rooj lub qhov rooj, xws li 90 feeb, thiab tsis tau obscured, pleev xim rau lossis tampered nrog txhua txoj kev.