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Manufacture of wire reinforced plastic pipe
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Method for forming spirally ribbed tubing
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Method of tapering metal tubes
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Method of manufacturing corrugated tubing of polytetrafluorethylene
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Process of curing rubber hose and the like
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Method of forming integral fins on tubing
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Forming die and process for tubular fittings
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Method of making spirally-grained seamless tubing
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Process of making forged-steel pipe-necks.
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Procede et appareillage pour la production de tubes flexibles ondules en spirale
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Способ изготовления спирально-профильных труб
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Способ правки проволоки
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Improved method for bending or curving copper and like pipes
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Способ изготовлени эксцентрических переходов и оправка дл его осуществлени
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一种橡胶的后处理装置
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