WASHINGTON â The Supreme Court openly struggled Wednesday with the racial preferences used by the University of Texas to achieve student diversity, as several conservative justices questioned how much is enough to declare affirmative action programs no longer necessary.
Gas metal arc welding (GMAW), also known as metal inert gas or MIG welding, is a semi-automatic or automatic process that uses a continuous wire feed as an electrode and an inert or semi-inert gas mixture to protect the weld from contamination.
Shielding gas protection. Shielding gases for MIG/GMAW welding. The basic gas for MIG/MAG welding is argon (Ar). Helium (He) can be added to increase penetration and fluidity of the weld pool. Argon or argon/helium mixtures can be used for welding all grades.