This method has the disadvantages of low measuring precision, requiring environment of darkroom, and making eyes tired after a long-time testing.
此方法具有测量精度较低，使用环境要求暗室，长时间的测试容易使人眼疲劳等缺点。
The scientific method is based on defining a problem, measuring the impact of the problem, determining root causes, and forming and testing hypotheses.
该科学方法根本点在于确定问题，衡量问题的影响，探寻问题的根源，构造假说和验证假说。
A method, laying a triangular wood under the untested wheel, for testing and measuring parking brake force is described in this paper.
阐述了在非测试轮下用放置三角木的方法可测得较大的手制动力。
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