有一光电控制液面高度的仪器它是通过光束在液面上的反射光线反射到光电屏上的光�位置来判断液面高低的.如图光路中一光束与液面的夹角为40°则 Template




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tomski有一光电控制液面高度的仪器它是通过光束在液面上的反射光线反射到光电屏上的光�位置来判断液面高低的.如图光路中一光束与液面的夹角为40°则 coloring