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Imiyoboro y'icyuma idafite umugozi ya ASTM A 106 Black Carbon Seamless Steel ikoreshwa mu buryo butandukanye bwo gutanga serivisi z'ubushyuhe bwinshi
Muri Botop, twishimiye kuba ishami mpuzamahanga rya Hebei allland Steel Tube Group, kandi dufite ubwoko bwinshi bw'imiyoboro y'ibyuma idakora neza kugira ngo ihuze n'ibyo abakiriya bakeneye....Soma byinshi