LANGER E1 Khazikitsani Chitsogozo Chokhazikitsa Chitetezo cha Chitetezo
Dziwani zambiri za buku la E1 Set Immunity Development System lolembedwa ndi Langer EMV-Technik GmbH. Dziwani zambiri zazinthu monga SGZ 21, BS 02, ES 00, ndi zina. Mvetsetsani mfundo zoyezera komanso momwe mungalumikizire sensa ya kuwala kwa S21 kuti muchepetse kuponderezedwa kwa EMI m'mabokosi osindikizidwa.