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2. Gauge block - Wikipedia

   en.wikipedia.org/wiki/Gauge_block

   Gauge blocks (also known as gage blocks, Johansson gauges, slip gauges, or Jo blocks) are a system for producing precision lengths. The individual gauge block is a metal or ceramic block that has been precision ground and lapped to a specific thickness. Gauge blocks come in sets of blocks with a range of standard lengths.

3. Carl Edvard Johansson - Wikipedia

   en.wikipedia.org/wiki/Carl_Edvard_Johansson

   Carl Edvard Johansson (15 March 1864 – 30 September 1943) was a Swedish inventor and scientist. Johansson invented the gauge block set, also known as "Jo Blocks" ("Johansson gauge blocks"). [ 1 ] [ 2 ] He was granted his first Swedish patent on 2 May 1901, Swedish patent No. 17017 called "Gauge Block Sets for Precision Measurement".

4. Gauge (instrument) - Wikipedia

   en.wikipedia.org/wiki/Gauge_(instrument)

   Dial indicator, also known as a dial test indicator, dial gauge, or probe indicator an instrument used to accurately measure small linear distances. Feeler gauge: a simple tool used to measure gap widths. Gauge block, (also known as a gage block, Johansson gauge, slip gauge, or Jo block) a precision ground and lapped length measuring standard.

5. Slip gauge - Wikipedia

   en.wikipedia.org/?title=Slip_gauge&redirect=no

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6. List of narrow-gauge model railway scales - Wikipedia

   en.wikipedia.org/wiki/List_of_narrow-gauge_model...

   Thus the scale and approximate prototype gauge are represented, with the model gauge used (9 mm for H0e gauge; 6.5 mm for H0f gauge) being implied. [2] The scales used include the general European modelling range of Z, N, TT, H0, 0 and also the large model engineering gauges of I to X, including 3 + 1 ⁄ 2, 5, 7 + 1 ⁄ 4 and 10 + 1 ⁄ 4-inch ...

7. Hegman gauge - Wikipedia

   en.wikipedia.org/wiki/Hegman_gauge

   A typical Hegman gauge is 170mm by 65mm by 15mm, with a channel of grooves running lengthwise, 12.5mm across and narrowing uniformly in depth from 100 μm to zero and used to determine particle size. [ 3 ]

8. List of rail transport modelling scale standards - Wikipedia

   en.wikipedia.org/wiki/List_of_rail_transport...

   In terms of model railway operation, gauge 3 is the largest (standard gauge) scenic railway modelling scale, using a scale of 13.5 mm to the foot. The Gauge '3' Society represents this aspect of 2 + 1 ⁄ 2-inch gauge railway modelling with both electric and live steam operation. Gauge '3' corresponds to NEM II scale, also known as "Spur II" in ...

9. List of track gauges - Wikipedia

   en.wikipedia.org/wiki/List_of_track_gauges

   See 9 + 7 ⁄ 16 in (240 mm) gauge ridable miniature railways: 241 mm 9 + 1 ⁄ 2 in: See 9 + 1 ⁄ 2 in (241 mm) gauge ridable miniature railways: 260 mm 10 + 1 ⁄ 4 in: See 10 + 1 ⁄ 4 in (260 mm) gauge ridable miniature railways: 267 mm 10 + 1 ⁄ 2 in: England Beale Park miniature railway 305 mm 12 in: See 12 in (305 mm) gauge ridable ...