| 摘要 |
The specification discloses a mobile rail vehicle movable on the rails of a rail-tie panel assembly and carrying a pair of swingable arms at one end for supporting and positioning a C-frame to which a hydraulic press cylinder is attached for effecting installation of spikes in a tie by the combined forces of the press cylinder and the reactive force of the C-frame on the tie. A swiveling ram head on the cylinder rod holds a spike erect while pressing it into the tie and disengages itelf from the spike, when installed, by simple pulling action.
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