| 释义 |
ˈpump-rod
A rod (rod n. 9 a) connecting the piston or plunger of a pump with the motive power; in mines a heavy iron or wooden beam or system of beams.
1825J. Nicholson Operat. Mechanic 178 A pull at both ends of the beam, at the one end by the weight of the pump-rod. 1834–6Barlow in Encycl. Metrop. (1845) VIII. 101/1 The beam and pump-rods, sometimes weighing many tons. 1855J. R. Leifchild Cornwall Mines 192 The whole column of pumps in a shaft is worked by a single pump-rod. |