I make it very simple — I make the length one meter, and I hang on the rod, at the bottom, a mass m, which, let's say, is 500 kilograms.
为了简单-，假设长度为一米，我握住这棒子，底部挂质量M的物体，重为500公斤。
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In the end of the paper, we further discussed M-BUS, the significant meter bus in the field of heat metrology automation, and pointed out its advantages over RS-485.