IFAN PEX-AL-PEX yeeb nkab, sib tshooj yeeb nkab muaj 4 cov kab ntau lawm, cov yeeb nkab laser muaj 4 cov kab ntau lawm, cov khoom txhua hnub ntau tshaj 200, 000 meters, thiab cov khoom siv, xim, ntim, thiab lwm yam tuaj yeem kho raws li xav tau. Txais tos kom nug thiab tso qhov kev txiav txim.
