| 1. | Pitch surfaces are the imaginary planes, cylinders, or cones that roll together without slipping.
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| 2. | The pitch plane of a rack or crown gear is also the pitch surface.
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| 3. | The slippery pitch surface and tough tackling by the Poles thwarted Portugal's slick passing game.
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| 4. | It is properly the radius of curvature of the pitch surface in the given cross section.
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| 5. | A pitch plane in an individual gear may be any plane tangent to its pitch surface.
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| 6. | The pitch surface is artificial and it had to be relaid in 2008 at FIFA's request.
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| 7. | Neither the referee, the Premier League nor ourselves had been notified of the change in pitch surface.
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| 8. | This definition is applicable to every type of gear for which a pitch surface can be defined.
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| 9. | The "'pitch plane "'of a pair of gears is the plane perpendicular to the axial plane and tangent to the pitch surfaces.
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| 10. | The 3G pitch surface is estimated to be used for a total of 90 hours with 2, 200 players using it weekly.
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