Txhua yam khoom yuav tsum tau cim nrog lub chaw tsim khoom' cim tsis pub dhau 20mm saum toj hauv qab ntawm lub raj mis.
Txhua pob yuav tsum muaj daim ntawv pov thawj ntawm kev ua raws lossis daim ntawv ua raws, qhia lub npe ntawm cov chaw tsim khoom, chaw, lub npe khoom, kev qhia tshwj xeeb, kom muaj nuj nqis, hnub tsim khoom, lub npe ntawm tus neeg uas tshuaj xyuas lub ntim (chaws), thiab cov lus [ GG] quot; fragile" ;," tuav nrog kev saib xyuas" thiab lwm cov lus.