Flexible door ensure easy maintenance and cleanness on the fan motor and impeller.

外摆式的检修门方便电机和叶轮检修与保养。

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Please infuse with pencil powder into key-hole then running few times when door open is not flexible.

门锁开启不灵活时，请往钥匙孔内加入适量的铅笔芯粉末再往来转动几次即可。

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A flexible memristor has been developed by the U.S. National Institute of Standards and Technology, opening the door to new memory technologies.

美国标准技术研究所(NIST)最近宣称他们发明了一种新的内存技术：柔性记忆电阻技术。这是一种新型的记忆电阻技术。

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It is convenient, flexible, and, in a small country, allows passengers and goods to be shipped from door to door.

ECONOMIST: Roads and rail

Justice Stephen Breyer said that in today's world, a registered letter is worse than ordinary mail, noting that "we don't all have butlers at the door" and asking why the U.S. Post Office can't be more flexible, like Federal Express.

FORBES: Magazine Article