| http://www.w3.org/ns/prov#value | - search also descriptions 2 DIGITAL BLUE LED 10K HIGH RPM RACING TACHOMETER GAUGE/GAUGES METER W/WARNING ITEM SKU: GA-TACH-DIG Digital LED Tachometer GaugeA tachometer is an instrument that measures the rotation speed of a shaft or disk, as in a motor or other machine.
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