The article explained the detection method of reference point of vertical machining center and the process of the diagnoses and excluding deceleration switch failure.

本文阐述了加工中心参考点的检测、减速开关故障的诊断及维修步骤。

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The inverted vertical in dam distortion monitoring is an observing reference point, the installation precision of which affects the observation precision.

倒垂线在大坝变形监测中是一个观测基准点，其安装精度的高低直接影响着大坝变形的观测精度。

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With the vertical launch point of gold last year as a reference, it is basically flat.

FORBES: Apple: Good As Gold . . . Down 20 Percent Then Flat?