The research result in the paper shows that accurate tool face angle can still be obtained under this circumstance.

研究表明，即使在这种情况下，完全可以求得准确的工具面角；

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The measure theories and methods of tilt angle and face angle are introduced combining with the composing principle and design of the transmitter of No-Dig navigating instrument.

结合非开挖导航仪器中探头部分的整体构成原理与设计，介绍了倾角、工具面向角等关键技术参数的检测原理与方法。

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But if that ground is, indeed, sloping, it means that the wind (which tends to follow the ground when it is close to the surface) hits the blades of the turbines at an Angle instead of face on.

但是，如果此处地面确实是倾斜的，这则意味着风(贴近地面吹向叶面)从一种角度吹向发电机叶片，而非正面对吹。

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The path, tempo and face angle seemed to line up fine in this admittedly un-scientific test, but more importantly, when the device said a putt was bad, we generally missed it.

ENGADGET: 3BaysGSA Putt: a Bluetooth golf gadget that puts eyes in your putter (hands on)

Following each flail, a clear graphic representation of your stroke path along with several key stats will display on your device: the critical putter-face angle at impact and tempo, among others.

ENGADGET: 3BaysGSA Putt: a Bluetooth golf gadget that puts eyes in your putter (hands on)

But since a single degree deviation of the face angle can cause you to miss a six foot putt, this data can help set you straight, once you figure out how to use it.

ENGADGET: 3BaysGSA Putt: a Bluetooth golf gadget that puts eyes in your putter (hands on)