THREE DIAMONDS
FILTERS, STRAIN METERS, MICROSCOPES, PHOTO-ELASTICITY INSTRUMENTS, POLARIZING PLATES, POLARIZING TEACHING TOOLS, CONSTANT TEMPERATURE OVENS, FURNACES FOR EXAMINATION, TELESCOPES, PRISMS, MAGNIFYING GLASSES, CAMERAS, FLASHING APPARATUS, MOVING PICTURE CAMERAS, MOVING PICTURE PROJECTORS, THERMOMETERS, BALANCES, REVOLUTION-INDICATORS, SPEED METERS, PHOTOMETERS, FLOWMETERS, AUTOMATIC HEAT REGULATORS, AUTOMATIC VACUUM REGULATORS, PROGRAM REGULATORS, MATERIAL TESTING MACHINES, SURVEYING INSTRUMENTS...
Expired · March 18, 1964 · 72189000 ·