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2. Natta projection - Wikipedia

   en.wikipedia.org/wiki/Natta_projection

   In a hydrocarbon molecule with all carbon atoms making up the backbone in a tetrahedral molecular geometry, the zigzag backbone is in the paper plane (chemical bonds depicted as solid line segments) with the substituents either sticking out of the paper toward the viewer (chemical bonds depicted as solid wedges) or away from the viewer ...

3. Wedge (golf) - Wikipedia

   en.wikipedia.org/wiki/Wedge_(golf)

   The class of wedges grew out of the need for a better club for playing soft lies and short shots. Prior to the 1930s, the best club for short "approach" shots was the "niblick", roughly equivalent to today's 9-iron or pitching wedge in loft; however the design of this club, with a flat, angled face and virtually no "sole", made it difficult to use in sand and other soft lies as it was prone to ...

4. Pitching wedge - Wikipedia

   en.wikipedia.org/wiki/Pitching_wedge

   Though technically a wedge, pitching wedges are generally treated as if they were numbered irons.This is for a number of reasons: first, before the term "wedge" became common for high-loft short irons, the pitching wedge was actually numbered as the "10-iron" of a matched set, and to this day it follows the normal loft progression of the numbered irons.

5. Gap wedge - Wikipedia

   en.wikipedia.org/wiki/Gap_wedge

   Gap wedges are loosely defined, but typically have the loft between that of a pitching wedge and sand wedge, between 50 and 54 degrees. [2] At the extremes there is redundancy with either the pitching wedge (typically 48°) or the sand wedge (typically 56°), however some players will "fine-tune" the lofts of these other wedges to their play style, leading to alternate loft choices for a gap ...

6. Structural formula - Wikipedia

   en.wikipedia.org/wiki/Structural_formula

   Wedges are used to show this, and there are two types: dashed and filled. A filled wedge indicates that the atom is in the front of the molecule; it is pointing above the plane of the paper towards the front. A dashed wedge indicates that the atom is behind the molecule; it is pointing below the plane of the paper.

7. Obsolete golf clubs - Wikipedia

   en.wikipedia.org/wiki/Obsolete_golf_clubs

   Lofter – A metal-headed golf club with a moderate loft ranging from a modern five iron to an eight iron. Niblick or Rut Niblick – a trouble club and pitching iron and generally the most lofted of the 19th century irons, with a very small rounded head and a loft equivalent to a modern nine iron or wedge. [5] [better source needed]