firnn.粒雪;积雪
firn.枞树;冷杉;枞木
firing machine加煤机,放炮器
Fir plantation杉木人工林
firtilized egg受精卵
firing-pointn.燃点;发射地点;射击位置
firing pattern爆破钻孔型式,钻孔布置平面图
fir wood plank杉木床板
firing battery点火电池组
firing ripples连发射击
firing of mine矿井着火
firing-level发放阈:产生全或无冲动的除极化阈