Chii chinonzi UD jira mune bulletproof vests?

UD (Unidirectional) jira imhando ye-high-simba fiber material apo mafiibhi ose anoenderana nenzira imwe. Yakaturikidzana muchinjika-pattern (0 ° uye 90 °) kuti iwedzere kupikisa bullet uchichengeta vheti yakareruka.