| 摘要 |
<p>The control devices of this type are used in power shovels or as independent installations. The control device comprises hydraulic, logic binary elements which are controlled by the output signals of a hydraulic processor which analyses the signals from a tank and a pressure generator and which provides the working liquid to the jack for the lifting of lowering thereof. The control device is used in power shovels or as a self-contained installation for executing various operations, such as the beating of piles, the extraction of overhanging rocks in the mining industry, the removal of slag in casting ladles, etc.</p> |
