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2. Punchcutting - Wikipedia

   en.wikipedia.org/wiki/Punchcutting

   Punchcutting is a craft used in traditional typography to cut letter punches in steel as the first stage of making metal type. [1] Steel punches in the shape of the letter would be used to stamp matrices into copper, which were locked into a mould shape to cast type. Cutting punches and casting type was the first step of traditional typesetting ...

3. Amazon Marketplace - Wikipedia

   en.wikipedia.org/wiki/Amazon_Marketplace

   Amazon charges its third-party merchants a referral fee for each sale which is a percentage of the sales price. Additionally fulfillment by Amazon (FBA) fees, referral fees, subscription fee and storage fees. and also the advertising on Amazon which is optional. As of 2020, third-party sales on Amazon accounted for 54% of paid units. [2]

4. Die (manufacturing) - Wikipedia

   en.wikipedia.org/wiki/Die_(manufacturing)

   A die is a specialized machine tool used in manufacturing industries to cut and/or form material to a desired shape or profile. Stamping dies are used with a press, [1] as opposed to drawing dies (used in the manufacture of wire) and casting dies (used in molding) which are not.

5. Punch (tool) - Wikipedia

   en.wikipedia.org/wiki/Punch_(tool)

   A center punch is used to mark the center of a point. It is usually used to mark the center of a hole when drilling holes. A drill has the tendency to "wander" if it does not start in a recess. A center punch forms a large enough dimple to "guide" the tip of the drill. The tip of a center punch has an angle between 60 and 90 degrees. [1]

6. Punching - Wikipedia

   en.wikipedia.org/wiki/Punching

   The punch force required to punch a piece of sheet metal can be estimated from the following equation: [4] F = 0.7 t L ( U T S ) {\displaystyle F=0.7tL(UTS)} Where t is the sheet metal thickness, L is the total length sheared (perimeter of the shape), and UTS is the ultimate tensile strength of the material.

7. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!