The problem of noise in civil aircraft and the possibilities of its elimination
PRESSURE TESTING 1000 lb per sq in (Hydraulic)
PRESSURE TESTING 2500 lb per sq in (Hydraulic)
PRESSURE TESTING 200 lb per sq in (Hydraulic)
Analysis and testing of coal in relation to its properties and utilisation
Technical quality control of aircraft parts by radiography
Study of use of X-rays for examination of metals
PRESSURE TESTING Hydraulic - As Specified
Dilution of Exhaust-gas Samples from a Multicylinder Engine Equipped with an Exhaust-gas Collector