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Weld symbols per DIN EN ISO 2553 explained: the structure of arrow and reference lines, what symbol placement means, and how to read the weld size.
DIN EN ISO 5817 explained: quality levels B, C, and D for welds, which imperfections are tolerated, and how to specify the right level upfront.
Hardness testing per Brinell, Vickers, and Rockwell compared: which method fits which component, and how to read a hardness value on a test certificate.
Destructive and non-destructive material testing compared: methods, typical applications, and what buyers should specify before ordering.
Calculating freight costs: how base freight, surcharges such as BAF and THC, and chargeable weight add up to your true, actual shipping costs.
Export packaging explained: what seaworthy packaging means, how VCI corrosion protection works, and what ISPM 15 requires for wood packaging.
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