gaasitühikuteta valandite tootmine survevaluvormi aktiivgaasiga (peam. hapnikuga) eeltäites (vt survevalu; vrd vaakumsurvevalu), a special method in which die casting is accomplished by filling die cavities with an "active gas" (usually oxygen), which easily combines chemically with molten metal to form finely dispersed solid preventing gas bubles in the product (see: die casting; compare: vacuum die casting)