| 摘要 |
A traction device comprising a mat made of molded thermo-plastic material having a generally rectangular frame, a traction area and an approach area on each side of the traction area. The traction area occupies approximately half of the length of the mat and the approach areas are made of bars extending generally parallel to the sides of the mat and perpendicular to each other defining rectangular areas. The traction area is made of bars arranged at approximately 45 DEG angles to the sides of the frame and intersecting each other at approximately right angles. The bars are generally T-shaped. The vertical bar of the T is generally elliptical and the horizontal bar is generally elliptical with a flat top surface.
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