| 摘要 |
An earth working implement comprising a main frame which may carry earth working tools, together with foldable extendable side gangs of working tools. The invention is particularly directed to means to raise, lower, and lock the wing gangs in positive manner when in the working position. The invention embodies mechanism which permits the raising, lowering, locking and unlocking to be accomplished by a single motor such for instance, as a fluid pressure cylinder. The apparatus may be tractor drawn and the controls for the various cylinders may be located in easy reach of the tractor operator.
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