As a component of architecture, door has its own basic function.

“门”作为建筑的构件有着其自身的基本功能。

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The door is open run in peace folding doors around the hinge rotation, the maximum stress component is the hinge, bearing friction hinge is very small, the noise is small.

折叠门和平开门运行中门扇是绕铰链旋转的，受力最大的部件是铰链，铰链的轴承摩擦阻力很小，噪音也很小。

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Quick-opening closure is a common pressure-bearing component in pressure vessel. Quick-opening closure is often opened with pressure or boosted without closing the door resulting in kinds of accident.

快开端盖是压力容器中的一个常见的承压部件，快开端盖经常因带压开门或未关紧门升压导致各种事故。

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The WiFi component is a welcome option as well, opening the door to low-budget remote shooting and streaming, which could be especially handy for solo bloggers or vacationers. 60fps Full HD capability is also a nice touch, although action shooters would do well to not mistake the unit for a dedicated sports shooter and let it clatter to the pavement.

ENGADGET: Canon Vixia R40 wireless camcorder hands-on (video)

Since federal spending is a direct component of GDP, the stimulus will improve the statistics when the money starts flying out the door.

FORBES: The Economy