So a good contrast could be obtained in measuring the cutting-rate of saw-chains through the special testing device.

采用这种试验机测定不同锯链的锯切效率，可比性强。

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Digital X-ray system for Testing wheels is composed of high frequency X-ray unit, X-ray image intensifier, the special mechanical device, computer image processing system, controller and lead cabinet.

轮毂X射线检测系统由高频X射线机、X射线图像增强器、轮毂检测专用机械装置，计算机图像处理系统、控制装置和铅防护房组成。

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