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Carbon et carbon-manganesum chalybem seamless fistulae et fistulae adamantinos pro shipGB/T5312
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Seamless chalybe tubes for structural purposeGB/T8162
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Frigido stricto vel frigore inconsutilem ferro involvit accuratius tubesGB / T3639
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Seamless chalybe tubes for high-press for chemical stercoring equipementsGB/T6479
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Seamless chalybe tubes and pipes for high pressure boilerGB/T5310
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Seamless chalybe tubes for low and middle pressure boilerGB/T5310
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Seamless chalybe tubes for liquid serviceGB/T8163
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Tubus chalybeis inconsutilem ad PETROLEUM crackingGB/T9948
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Seamless medium carbonis boiler et superheatris tube ASTM A210
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