Hoʻohana nui ʻia ka paipu kila seamless no ka hoʻolālā GB / t8162-2018 no ka hana maʻamau a me ka mīkini. ʻO kāna mea i hōʻike ʻia (mark): ke kila kalapona 20 #, 45 kila; Alloy steel Q345, 20Cr, 40Cr, 20CrMo, 30-35crmo, 42CrMo, etc. Structural stainless steel seamless paipu (GB / T14975-2002) he wela ...
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