Iingxowa zeZipper zeTywina eziHlanganisiweyo eziMile ngendlela ekhethekileyo, ezineMilo emithathu, ezinokuphinda zisetyenzisweUmthengisi weengxowa ezineziphu ezineziphu zePrimiyamu zeminyaka engama-20 nangaphezulu ezinokuphinda zisetyenziswe, ezinemilo ekhethekileyo, ezinemilo emithathu, ezipakishwe lula, izixhobo ezikumgangatho wokutya, ezenziwe ngokwezifiso ngokupheleleyo, ukuthengiswa ngokuthe ngqo kwifektri,
Iifektri ezi-3 (CN/TH/VN) zeeodolo ezinkulu kunye nokuhanjiswa kwihlabathi liphela.
