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Manufacturing in the ‘50s 13-6-32 “Shoots self in foot,” 1932 13-6-30* Visit, Bloomfield, 1956, by Mullard 14-4-3* 2011 status 13-5-3. Tungsram (French) 20-6-8. Tungsram, "mini-loktal" tubes 10-3-38. Triad 3-4-15. and “tube inflation” 14-4-18* and T-10S 18-5-8* MG tubes 17-4-30@, 21-1-20@ Triotron (Austria) 17-4-3. TSF, '20s Argentine ... ................
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