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Origin and history of the valve

Every day contact with the valve, do you know the origin of the valve, the history? Broadly speaking, during the Warring Kingdoms period thousands of years ago, ancient people used valves to

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Welding principle.

Welding Principle. Insertion welding is a metal welding method that is usually achieved by gas welding, TIG welding or MIG welding. The principle is,

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Hygienic class valve

Hygienic class valve, as the name suggests, refers to food standards (pharmaceutical or sanitary standards) valve, the valve body must meet the sanitary standards of stainless steel, all of the

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