Update README.md

Omax/MicroMAX/README.md

 # Omax MicroMax
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+https://www.omax.com/omax-waterjet/micromax
+Nozzle: 7/15 MAXJET5 Minijet Nozzle with 0.007" ID diamond orifice and 0.015" Roctec 500 mixing tube
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+Abrasive: 240 mesh Barton HPX garnet with a mean particle size of 60 um at a flow rate of 0.12 lb/min
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+Pressure: 50 ~ 55 ksi
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+Cutting time: 3.1 min