1. Kev soj ntsuam pom: pov tseg tamper- cov ntawv pov thawj kev nyab xeeb (xws li cov khoom noj muaj kev nyab xeeb thiab tiv thaiv- cov ntawv pov thawj VOID) yuav tawm qhov cim "VOID" mus tas li lossis cov nplaum seem ib zaug torn. Daim ntawv lo saum npoo kuj tseem qhia txog kev puas tsuaj, tev, thiab wrinkles, ua rau nws tsis tuaj yeem rov qab nws lub xeev du.
2. Adhesion Verification: Tshiab, raws li daim ntawv lo yuav tsum tiaj tus, npuas -dawb, thiab tag nrho adhered rau saum npoo ntawm cov khoom raug sau npe. Yog tias muaj cov cim qhia tsis zoo los ntawm re- daim ntawv thov lossis cov nplaum qub qub ntawm cov npoo ntawm daim ntawv lo, nws qhia tau tias daim ntawv lo tau raug tshem tawm thiab rov ua dua - txuas.
3. Tshwj xeeb Mechanism Identification: Cov ntawv sau nrog ua - hauv tamper - cov cim hloov pauv (xws li ETC cov cim npe hluav taws xob) yuav ua rau lawv cov kev cuam tshuam sab hauv - pom tseeb tias yog txav los yog tshem tawm. Lub cuab yeej yuav ncaj qha tso saib cov lus "Label tshem tawm" thiab ua tsis tau.
