Adjustable choke
18 July 2017Air drilling
18 July 2017Air-actuated
Powered by compressed air, as are the clutch and the brake system in drilling equipment. See choke.
Adjustable choke
18 July 2017Air drilling
18 July 2017
Adjustable choke
18 July 2017Air drilling
18 July 2017Adjustable choke
18 July 2017Air drilling
18 July 2017
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