Tuubbada alxanka leh ee spiral welded (tuubo SSAW) waa nooc ka mid ah tuubooyinka birta tolaay ee ka samaysan gariiradda birta xariijimaha ah sida walxo ceeriin ah, kaas oo lagu alxanayo habka alxanka laba-geesoodka ah ee tooska ah ee arc oo lagu sii daayo heerkulka qolka. Injineernimada sahayda biyaha, warshadaha petrochemical, warshadaha kiimikada, e...
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