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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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20 St. 6 Min, 1 Jan 1952 Jahr - 1952- Cohen- first described principals of biological valve
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By
N. Husk
12 Nov 2017
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Datum:
20 St. 6 Min, 1 Jan 1952 Jahr
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~ 73 years ago
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