After having compared with common-used technique in contact wire height measurement, this paper describes a laser phase-detecting method to measure the height of contact wire.
在比较了以往采用的接触网导线高度检测技术后，开发出基于激光相位测距原理的接触网导线高度检测系统。
The process tomography is a new detecting technique, which is very important in two-phase flow measurements.
过程层析成象是一项新的两相流检测技术。
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