Advantage

• Patented invention (GWS swivel head has fluid passage adjustment mechanism).
• No need to use both core barrels depended on hard rock or soft rock formation.

 

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• No need to disassemble or additional parts such as shims to the core barrel at all.
• Adjust the clearance by any position required, and determine the exact clearance by visual judgment without vernier caliper.

 

 

Parts Structure

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