Pneumatic Hoisting Machine of Oil Wellhead Assembly
It is easy to operate,can be quickly applied,and can realize
Vertical Hydraulic Speed Regulation Ahead Box
The utility model relates to a horizontal hydraulic speed regulation
Horizontal Hydraulic Speed Regulation Ahead Box
At present,most of power units of domestic oil chain rigs adopt a hydraulic ahead
Novel Hydraulic Governing Box of Oil Rig
The novel hydraulic governing box of oil rig is mainly applied