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ʻO ASTM A 106 Black Carbon Seamless Steel Tubes no nā ʻano hana lawelawe wela kiʻekiʻe like ʻole
na ka luna hoʻomalu ma 23-05-12
Ma Botop, he mea hoʻohanohano iā mākou ke lilo i lālā honua o Hebei allland Steel Tube Group, a mālama pū mākou i kahi ākea o nā ʻano paipu kila humuhumu e hoʻokō i nā pono o nā mea kūʻai aku....
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