“double swing door”的概念、定义、翻译、参考文献-科学参考

单词	double swing door
释义	double swing door Encyclopedia 工学门释 double swing door弹簧门一种水平开启的门，与普通平开门一样其转动轴位于门侧边，所不同的是弹簧门采用了弹簧铰链（合页）或门顶弹簧、地弹簧代替普通铰链，使得门扇可顺时针和逆时针双向旋转开启，且能自动关闭。
随便看	first point of Aries first point of aries first point of Cancer first point of Capricornus first point of Libra first point of libra first polar first polar body first postulate of thermodynamics first principal line first principal plane first principle first-principle first principle calculation first principles first principles calculation first-principles calculation first principle's method first problem of Cousin first prolongation first quadrant first quality ware first quantization first quantum number first quarter

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