Qalabka birta ee birta
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Asme b16.9 a234 wpb kaarboon bisilka birta
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Asme b16.9 A234 WPB BUTT WELL CARBARN STELL TEE
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Tuubbada birta ee birta ah
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Subow suxul / birta, birta steel, con. Qalabka tuubbada caagga ah ee birta
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Asme / ansi b16.5 & b16.47 - tuubbada birta ah ee cajiinka
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Api 6d valve, been abuur ah oo la tuuray tuubbada tuubbada