A hydraulic gripper and moving jack for moving heavy structures, such as an oil derrick, along a flanged member. The gripper engages the flanged member with a frictional grip.
HYDRAULIC GRIPPER AND MOVING JACK
25
Nov
Nov
A hydraulic gripper and moving jack for moving heavy structures, such as an oil derrick, along a flanged member. The gripper engages the flanged member with a frictional grip.
