martäänprotsess, mille puhul ahjutäite põhiosaks on toormalm, ülejäänu moodustavad vanaraud ja rauamaak (vt martäänsulatus)
a version of open-hearth process (Siemens-Martin process) in which a furnace charge consists mainly of pig iron with additions of steel scrap and iron ore (see: open-hearth process)
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