firs[计] 先前的
firn.枞树;冷杉;枞木
firing technique点火技术
firing equipment加热设备
firing capacitor点火电容器
firing stability射击稳定性
firing precision射击准确度
firing mechanism击发机构,发火机
firing J-Horner射击调平装置
firing employment火力运用
firs round attack第一回合进攻
firing dispersion密集度