摘要 |
<p>The shell has an equilateral triangle shaped case (1) on which a drumhead (2) is installed and stuck in a frame (4). Tension in the drumhead is realized by installing a support triangle (5) on the frame, which pushes the drumhead with supports (7, 9) distributed on apex and sides of the triangle using the screw, through a locking unit (6). Edges of the case are cut at an angle of 45 degree for limiting the inclination of the drumhead.</p> |