utmost field circularity of fire极限射击圆
upward field of fire射界上限
utmost field of fire极限射击范围
effective field of fire有效射界
horizontal equilibrium field of fire水平射界
all round field of fire圆周射界
Boundary of fire field火场边界
N(名词) the area that a weapon or group of weapons can cover with fire from a given position 射程