87131135
Aug 8, 2016
Aug 1, 2017
Industrial furnaces, namely, electrical, gas, oil, or induction heated industrial furnaces; industrial treatment installations, namely, furnaces; furnaces for the treatment of metal or alloy parts; industrial ovens and furnaces for vacuum heat treatment, not for food or beverages; vacuum furnaces; vacuum carbonitriding systems comprising carbonitriding furnaces, high pressure gas quench systems, and vacuum oil quenching systems comprising quenching apparatus for heat treatment
Environmental Control Apparatus