| 摘要 |
A free-floating hydraulic piston cylinder situated in sideto side orientation in which the piston rod advances from the cylinder which it causes to move in the opposite direction. To the piston rod as well as to the opposite end of the cylinder is connected linkage which changes the direction of force and pushes a moveable frame with attached spears in a forward ready-forwork direction. This arrangement permits the attachment of a great number of the spears because the moving frame can be efficiently acted upon all the way along its length rather than just near its middle portion.
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