Cryogenic apparatus and instruments for laboratory use, namely, ultra-low temperature refrigerators, dilution refrigerators, controllers for controlling the operation of the ultra-low temperature refrigerators and dilution refrigerators, sample and measurement probes for holding samples and taking measurements for experiments, chambers and chamber inserts, and replacement parts and fittings for the listed goods

DILUTION REFRIGERATOR UNITS OPERATING AT EXTREMELY LOW (MILLIKELVIN) TEMPERATURES FOR USE BY SCIENTIFIC RESEARCH INSTITUTIONS * FOR THE PURPOSE OF COOLING SAMPLES OF MATERIAL OF 10MM OR LESS IN DIAMETER TO TERMPERATURES NEAR ABSOLUTE ZERO *