Academy
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What is an inch, what is DN, and what is Φ?
What is an inch: An inch (“) is a commonly used unit of measurement in the American system, such as for pipes, valves, flanges, elbows, pumps, tees, etc. For example, a size of 10″. The word inch (abbreviated as “in.”) in Dutch originally meant thumb, and an inch is the le...Read more
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Jinan steel group industry park, Wuan, Handan, China