块形变幅杆
一种在侧面和端面都开槽（即交叉开槽）的矩形变幅杆。块形变幅杆通常是非成型的。
块形变幅杆的尺寸按以下顺序标注：
示例：200 mm x 150 mm 的块形变幅杆，其端面宽度为 200 mm，端面厚度为 150 mm。
Block horn
A rectangular horn that is slotted on both the sides and ends (i.e., cross slotted). Block horns are usually unshaped.
The dimensions of a block horn are specified in the following order:
Example: a 200 mm x 150 mm block horn has a face width of 200 mm and a face thickness of 150 mm.