火门，枪膛或炮膛上的孔,用以对火药点火(如前装式炮膛室顶上的孔或尾装式炮闩的轴线上的孔)。
大家都知道Windows Media和WithMP3有屏幕切换（Screen Toggle）的功能，即定义某个按键用来关闭屏幕，这个功能非常的实用，至少能节省电源。
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防火门 labeled door ; fire-proof door ; fire door
钢质防火门 Fire Resistance Steel Door ; fire resistant steel doorsets ; Steel fireproof door ; steel fire resistant door
自动防火门 automatic closing door ; automatic fire door ; heat-actuated fire door
电镀钢包防火门 Electro-Galvanised Steel-Clad Fire Door ; Clad Fire Door
耐火门 fireproof door
木质防火门 fire-proof wooden door ; fire resistant timber doorsets ; wood fire resistant door ; Wooden fireproof door
自动关闭防火门 self closing fire door ; automatic closing fire door
包金属的防火门 kalamein ; metal-clad fire door
复合防火门 composite fire door
大家应该知道最近的火警报警器在什么位置，还有火灾发生时安全出口在哪，火门在哪。
Everyone should know where the nearest fire alarm box is located and where exits fire escapes, and fire doors are.
如果感觉很热，门后可能有烟或火，所以要小心。
If it feels hot, there may be smoke or fire behind the door, so take care.
他可以感受到从门以及地上传来的热，他估计火将在几分钟左右将驾驶室烧起来。
He could feel the heat radiating from the floor and door, and figured the fire would burn its way through the cab in a matter of minutes.
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