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It contains 3 sections: a nut, a woman conclude plus a male stop. When the female and male finishes are joined, the nut seals the joint by pressing The 2 finishes tightly together. Unions absolutely are a sort of really compact flange connector. This post includes a list of references, http://valves-and-fittings27775.thezenweb.com/A-Review-Of-valves-and-fittings-28423729


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