What percentage of the planet’s rare earth elements are found in China? 15 percent
55 percent
95 percent
100 percent

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Machinery that is a key part of the process and without which the plant or process cannot function is classifed as: (clo4) a)-critical machinery b)-essential machinery c)-general purpose machinery d)-none of the specified options.