A trailing pole hinged to the rear of a vehicle to check its backward movement when it stops in a steep ascent.
| 单词 | θ201501 |
| 释义 | society > travel > means of travel > a conveyance > vehicle > vehicles according to means of motion > vehicle moving on wheels > [noun] > parts of vehicle moving on wheels > devices to retard or stop motion > device to stop backward movement (4) drag-staff1748 A trailing pole hinged to the rear of a vehicle to check its backward movement when it stops in a steep ascent. cow1834 Mining. A kind of self-acting brake with two prongs or horns used in ascending an inclined line of rails: see quot. 1849. (Also called bull.) scote1839 = drag-staff, n. Cf. scotch, n.2 1b. sprag1902 A stout piece of wood used to check the revolution of a wheel (or roller), usually by inserting it between two of the spokes. |
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