Material testing instruments and machines, namely, electronic servo-hydraulic, servo-pneumatic, servo-electric apparatus for testing strength, compression, tensile, fatigue, bending, creep, cyclic, repeat load, in-direct tensile, relaxation characteristics of construction materials; machines for testing, namely, asphalt, soil, unbound granular materials asphalt and unbound pavement materials testing machines * ; none of the foregoing being for use in relation to liquid steel *