These two fracture systems are nearly orthogonal in the plane view.

两个断裂系统在平面上呈近于正交的关系。

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The barycentric coordinates of the plane view projection of a coal face are solved with a formula of geometric gravity centre.

利用平面图形几何重心公式计算回采工作面水平投影图形的重心坐标，然后根据影响传播角和开采深度计算下沉盆地中心位置的坐标。

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Eventually, the man himself makes a fairly dramatic arrival as his plane slides into view just yards from the stage.

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And because they view buying plane tickets as a challenge, this mix of frequent flyers, travel agents and amateurs are often well informed about the ins and outs of booking long-haul flights or complicated itineraries.

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Indeed, in an effort apparently designed to calm concerns, one of Boeing's airline customers - Bjorn Kjos, chief executive of Norwegian Air Shuttle - has come out in defence of the plane, echoing the view that "minor problems" such as these should be expected.

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