This text introduced the basic requestion of the hydraulic oil of drilling jumbo, and introduced the selection of hydraulic oil.
介绍了凿岩台车对液压油的基本要求，以及液压油的选用。
This text introduced the basic requestion of the hydraulic oil of drilling jumbo, and introduced the selection of hydraulic oil.
介绍了凿岩台车对液压油的基本要求，以及液压油的选用。
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