Ends of the tegular filters (10) are cut off crosswise to make the end surfaces respectively form inclined surfaces such that vertical sections of the tegular filters (10) are in a rough trapezoid.
瓦状滤波器(10)的端部被
向切除以使端
分别形成，
而瓦状滤波器(10)的垂直
呈大致梯形。
Ends of the tegular filters (10) are cut off crosswise to make the end surfaces respectively form inclined surfaces such that vertical sections of the tegular filters (10) are in a rough trapezoid.
瓦状滤波器(10)的端部被向切除以使端分别形成，而瓦状滤波器(10)的垂直呈大致梯形。
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