Tetra-ethyl lead.
Alkylates.
Cumens and substitutes.
Hydrocodiners.
Hydropolymers.
Isohexanes.
(High octane blending agents for aircraft fuels.)
Isoctanes.
Isopentanes.
Isopropylether.
Neohexanes.
Triptane.
(High octane blending agents for aircraft fuels.)
Crude petroleum,
Motor fuel.
Diesel Oil (all nautical).
Kerosene.
Lubricating oils and greases.
Fuel oil.
Petroleum Equipment.
Oil well drilling and exploration equipment.
Solvent treatment equipment for lube oil production.
Hot oil pumps for alkylation, thermal and catalytic cracking, isomerization and hydroforming equipment.
Casing and oil pipe; seamless and welded.
Electronics.
Radio valve manufacturing machinery.
Electronic computors, except business type calculating machines.
Electronic microscopes.
Infra-red absorption meters.
Apparatus of a kind used to measure electric impedance at frequencies exceeding sixty megacycles per second and specialized parts thereof.
Radio field strength meters of a kind used at frequencies exceeding sixty megacycles per second; and specialized parts of auch meters.
Radio spectrum analysers, being apparatus capable of indicating the single-frequency components of multi-frequency oscillations having frequencies exceeding one hundred kilocycles per second; and specialized parts of such analysers.
Radio-frequency signal generators, being screened electric oscillators associated with attenuators of a kind used to provide signals having frequencies exceeding three hundred megacycles per second and magnitude tess than one microwatt or ten milli- volts peak value; and specialized parts of such generators,
Balances, electronic, capable of detecting differences in weight smaller than ten microgrammes; and specialized parts of such balances.
Resistors temperature-sensitive, of a kind used in bolometers or in the measurement of electric power below ten milliwatts, but not including electric lamps.
Apparatus for detecting or locating objects under water (excluding specific civil items; e.g., apparatus for detecting shoals of fish).
Location apparatus of a kind used for detecting objects or for determining the relative direction position or motion of objects by means of the constant velocity or rectilinear-propagation characteristics of electromagnetic waves having frequencies