The rudder device keyway to hole keyway , Hole of the conical hole, Not run through the holes, Moreover structure of two key connection , Large size , High precision machining.

舵装置的键槽是内孔键槽，孔为锥孔、盲孔，而且采用双键联接结构，尺寸大，加工精度较高。

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This concept is absolutely invaluable to the practice of interface design. For our purposes, the definition omits a key connection: How do we know what those properties offer to us?

这个概念毫无疑问对于界面设计工作有着巨大的价值，但是对于我们的设计工作来说，它忽略了一个关键联系，即如何知道提供给我们的特性是什么？

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This type of manufacturing and crafts work is today a key connection between the global city and the global slum.

FORBES: The Global City And The Global Slum

As our minds evolve along with these new technologies, the key connection between social media and revolutions will likely be a matter of focus.

FORBES: The Revolution Will Not Be Tweeted (Unless It Is)

Martin Cuff, an economic development specialist focusing on film, argues that the key is the emotional connection between audiences and what's on screen.

BBC: Does an Oscar really win tourism?