主权项 |
1. A biting device comprising:
a first section having a first end and a second end, said first end including a first cap; a middle section having a third end and a fourth end, said third end connected to said second end of said first section; and a second section having fifth end and a sixth end, said fifth end connected to said fourth end of said middle section, and said sixth end including a second cap; wherein a cross-section of said middle section along a first plane is smaller than a cross-section of said first and second sections along said first plane, and a cross-section of said middle section along a second plane that is perpendicular to said first plane is the same as a cross-section of said first and second sections along said second plane. |