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n4freepatentsonline.
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isa:222182390
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A basic body which consists of oxygen-free copper or an equivalent material such as silver or molybdenum and on which is galvanized a thin-walled, intermediary layer, likewise of oxygen-free copper or an equivalent material such as silver or molybdenum, and a thick-walled pressure jacket of nickel or a similar material with good strength characteristics, galvanized onto said intermediary layer.
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isa:222182390