Gas Industry | (NOV) Equipment Production Slide Chart (22201)

National Oil Well Varco (NOV) Fold and Glue (Plastic)

A Folded Plastic calculator, 2 x 4 inch, fits comfortably into a pocket and holds up well out in the field to calculate efficiency and output of oil wells.
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What is a Slide-Chart you ask? Watch the movie below for more info.