adj. trihedral
misc. three sided
汤上前收掉了三面的网，只留下一面的网。
Tang went forward and took away the net on three sides, leaving only one side there.
汤上前收掉了三面的网，只留下一面的网。然后，他对那人说。
Tang went forward and took away the net on three sides, leaving only one side there. Then he said to the man.
使用声强法对木工带锯机的噪声特性进行了测量，测得三面的声强值和噪声的矢量图、高线图、三维图。
The noise characteristics of the idle bandsaw were measured with sound intensity method. The values of sound intensity, vector chart, contour chart and mesh chart of noise were obtained.
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