A speed detector (58) detects a transport speed of the film.
速度检测器(58)检测膜的输送速度。
The speed radar detector is a necessity of monitoring vehicle speed for traffic control.
测速雷达是交通管理中监测车辆行驶速度的必备工具。
The speed radar detector is a necessity of monitoring vehicle speed for traffic control.
测速雷达是交通管理中监测车辆行驶速度的必备工具。
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