“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	land leasing land legislation in the period of the Jacobin’s dictator land leveler land leveling land leveling project land limitability land location landlocked state landlord Landlord Port land marginal revenue land mark landmark land market land market characteristics land market management landmatics land measurement land natural evaluation land neighboring right land net income land occupation Land-ocean Interaction in the Coastal Zone ，LOICZ Land-Ocean Interactions in the Coastal Zone land of Antarctic region

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