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2. Ultrasonic thickness measurement - Wikipedia

   en.wikipedia.org/wiki/Ultrasonic_Thickness...

   The ability to gauge thickness measurement without requiring access to both sides of the test piece, offers this technology a multitude of possible applications. Paint thickness gauges, ultrasonic coating thickness gauges, digital thickness gauges and many more options are available to test plastics, glass, ceramics, metal and other materials.

3. Dry lubricant - Wikipedia

   en.wikipedia.org/wiki/Dry_lubricant

   MoS 2 lubrication performance often exceeds that of graphite and is effective in vacuum as well, whereas graphite is not. The temperature limitation of MoS 2 at 400 °C is restricted by oxidation. Particle size and film thickness are important parameters that should be matched to the surface roughness of the substrate.

4. 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.

5. Hegman gauge - Wikipedia

   en.wikipedia.org/wiki/Hegman_gauge

   The grooves decrease in depth from one end of the block to the other, according to a scale stamped next to them. 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]

6. Body jewelry sizes - Wikipedia

   en.wikipedia.org/wiki/Body_jewelry_sizes

   A gauge number denotes a thickness on a standardized scale which, for most purposes, starts at 20g (0.812 mm thick— often used for the posts for nose studs), and increases in thickness (as the gauge number decreases) to 0g, then 00g, and rarely goes any further as these thicknesses come closer and closer to 1 ⁄ 2 ″.

7. List of track gauges - Wikipedia

   en.wikipedia.org/wiki/List_of_track_gauges

   See 3 + 1 ⁄ 2 in (89 mm) gauge ridable miniature railways. 121 mm 4 + 3 ⁄ 4 in: See 4 + 3 ⁄ 4 in (121 mm) gauge ridable miniature railways. 127 mm 5 in: See 5 in (127 mm) gauge ridable miniature railways. 145 mm 5 + 7 ⁄ 10 in and 5 + 45 ⁄ 64 in Denmark: Brandhøjbanen dk, at Hedeland veteran railway dk, Hedeland, Hedehusene, Høje ...