firs[计] 先前的
firn.枞树;冷杉;枞木
firing silver paste烧银点
firing top-centre点火上死点
firing optimization燃烧调整
fir tree connection枞树形叶根固定
firing accuracy test射击精度试验
firing time sequence发射时序
firing point shelter射击处遮屏
fir-fighting fleet消防舰队, 救火舰队
Firing effectiveness射击效能
firing system tester点火系统试验器