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Value Collection - Setup Block: 0.0003 Squareness, Hardened Steel, 1-2-3 Block - 06378012 - MSC Industrial Supply
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QUIX Precision 1-2-3 Steel Blocks | Versatile 23 Holes | Precision Ground & Case Hardened | Heat Treated to HRC 55-60 | Ideal for Professional Inspection, Calibration & Setup Work: Veritas Set
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Expanding the Usefulness of Your 1-2-3 Blocks with a Hardware Kit « Adafruit Industries – Makers, hackers, artists, designers and engineers!
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Timunr 1 Pair of Matched No Holes 1 x 2 x 3 Precision Parallel Blocks, 0.0001 Inch Alloy Steel 123 Parallel Block Set: Amazon.com: Industrial & Scientific
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WEN 3 in. x 2 in. x 1 in. Steel-Hardened Precision 1-2-3-Gauge Blocks (2-Pack) 10423 - The Home Depot
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2pcs/set 25-50-75mm Hardened Steel Blocks 0.005" Precision Matched Machinist 123 Milling Tool 23 Holes 1-2-3" block gauge - AliExpress
![A steel block of mass 10 kg rests on a horizontal floor as shown in the figure a. When three iron cylinders are placed on it as shown in the figure b, A steel block of mass 10 kg rests on a horizontal floor as shown in the figure a. When three iron cylinders are placed on it as shown in the figure b,](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1473473/original_3.png)