Bulletproof vests, also known as bulletproof vests, are used to protect the body from bullets or shrapnel. A bulletproof jacket mainly consists of a jacket and a bulletproof layer. The sheath is usual...
Alumina Fine Ceramics material is not uncommon. This precision ceramic material applies the chemical properties of alumina, but does not combine alumina with ceramics. Compared with other materia...
В раннем основном боевом танке начальная скорость вольфрамового сплава высокоскоростной кинетической энергии бронебойного снаряда достигала 1700 ~1800м/с, и он мог пробивать 800мм однородный арм...
