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HFBTE Laser Diameter Gauge Non-Contact Laser Diameter Measuring Instrument 0.2~30mm Range with Digtial Display Control Box Standard 10m Communication Cable : Amazon.ca: Tools & Home Improvement
What is the instrument used to measure the internal and external diameter of a tube of about 5cm bore? - Quora
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6 inch Digital Caliper Measuring Tool [Measure Outside, Diameter, Depth, Step] : Amazon.co.uk: Business, Industry & Science
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