“safety door”的概念、定义、翻译、参考文献-科学参考

单词	safety door
释义	safety door [`sāf·tē ´dȯr] ^{MINING ENGINEERING} An extra door ready for use in the event of damage to the existing ventilation door or in any emergency, for example, explosion or fire.
随便看	shunt peaking shunt reactor shunt regulator shunt repeater shunt T junction shunt transition shunt valve shunt-wound shut-down circuit shut height shut-in pressure shut-in well shutoff shutoff head shutter shutter dam shuttered fuse shuttered image converter shuttering shutterridge shuttle shuttle bombing shuttle box shuttle car shuttle conveyor

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