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Device for the collimated transmittance measurement: 1 is the plate; 2 is the pinhole’s holder (6 pcs.); 3 is the pinhole with a diameter 2 mm (6 pcs.); 4 is the plate for fixation of the samples; 5 is the sample clip (2 pcs.), 6 is the tissue sample sandwiched between two glass slides, 7 is the measuring channel, 8 is the reference channel.
