| 摘要 |
A control system for derricks, cranes, and the like consisting of a remote control box, fiber optic cable, reel, tubular connector, tube, swivel coupler, and terminal box which allows instructions for controlling the functional device to be sent from a location remote to the functional device via a light conducting element to a terminal box within a control center situated on the body of a truck, etc. on which said functional device is mounted.
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