High-frequency longitudinally welded paipu production laina ua nui hoʻohana 'ia no ka hana o welded kila paipu o φ8 ~ φ610 mm a me ka paia mānoanoa o 0.5 ~ 20mm like me ka hana ana o ka huinahalike, rectangular, a me na mea maʻamau seamless paipu profile, Carbon kila paipu. , Paipu kila ERW. Hiki i ka laina ke hana i nā paipu welded me ka mīkini maikaʻi maikaʻi a me ka hōʻuluʻulu kiʻekiʻe kiʻekiʻe i ka wikiwiki.