FIELD: testing equipment. SUBSTANCE: gear to test ring charges has base 1, hollow cylinder 2 and piston 3. Piston is produced in the form of sleeve placed bottom up inside hollow cylinder 2 and made fast to it. Piston is anchored on base 1 through calibrated membrane 5. Annular groove 9 to house ring charge 10 is manufactured in butt part of hollow cylinder. EFFECT: expanded application field. 1 dwg
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