Cov khoom zoo li siv arc tsim, haum lub xib teg, thiab xis nyob. Ib qho kawg ntawm cov khoom yog daim ntawv pov thawj ntawm tus kheej, thiab ib qho kawg yog lub thawv qhib, uas ua rau nws yooj yim dua rau qhib lub pob thiab ua rau cov ntaub ntawv pob tsis yooj yim rau xau.
Cov khoom siv sab nraud ntawm lub stamp yog ABS ib puag ncig tiv thaiv cov khoom, uas muaj qhov zoo ntawm cov ntxhiab tsw me me, hnav tsis kam, corrosion kuj, tsis yooj yim rau hlawv, thiab lwm yam, thiab cov neeg siv muaj kev ruaj ntseg ntau dua.
Cov khoom siv sab hauv yog yooj yim flash ua npuas ncauj ncoo, kev ua haujlwm ruaj khov, zoo nto, zoo li qhib, nruab nrab inking lub sij hawm, thiab zoo rov qab roj filling kev ua tau zoo. Ntshiab raug, tsis muaj ntug dawb, siab nto yaj txheej lub zog, hnav ntev, txhim kho yaj txheej thickness thiab ceev ua rau lub foob nto dub, ci dua, tsis muaj qeeb nkag mus rau tus number case, seal nyhuv yog txawv tshaj plaw.