1.B.7.Vacuum or other controlled atmosphere metallurgical melting and casting furnaces and related equipment, as follows:

a. Arc remelt furnaces, arc melt furnaces and arc melt and casting furnaces having both of the following characteristics:
1. Consumable electrode capacities between 1000 and 20000 cm³; and
2. Capable of operating with melting temperatures above 1973 K (1700 °C);
b. Electron beam melting furnaces, plasma atomisation furnaces and plasma melting furnaces having both of the following characteristics:
1. A power of 50 kW or greater; and
2. Capable of operating with melting temperatures above 1473 K (1200 °C);
c. Computer control and monitoring systems specially configured for any of the furnaces specified in Item 1.B.7.a. or 1.B.7.b.
d. Plasma torches specially designed for the furnaces specified in 1.B.7.b having both of the following characteristics:
1. Operating at a power greater than 50kW; and
2. Capable of operating above 1473 K (1200°C);
e. Electron beam guns specially designed for the furnaces specified in 1.B.7.b operating at a power greater than 50kW.