microgroove record (Q86816874)
mechanical sound recording with narrow grooves (around 100 grooves per centimeter, three times higher than in shellac records), usually stamped in 'vinyl' (PVC composite)
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other details
aliases microgroove
 fine
description mechanical sound recording with narrow grooves (around 100 grooves per centimeter, three times higher than in shellac records), usually stamped in 'vinyl' (PVC composite)

External Links
(P2671) /g/121_jmdy
(P9112) soundgrw#b