He loea mākou i ka hana ʻana o Welded Steel Pipes & Tubes. Ke hoʻolako nei mākou i hiki ke hōʻea i ka pae honua e like me: ASTM, JIS, DIN, EN, API, BS , Hoʻokō ʻia kā mākou hui e like me TS EN ISO 9001: 2000, API5 L, ISO 14001: 2004 a me ISO9001, SGS Integra. ...
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