DE3210500
OELERT, HANS HENNING, ER.NAT, HAEFFNER, ECKHARD., 3392 CLAUSTHAL-ZELLERFELD, DE, BECKH, WOLFGANG., 8451 HALMBACH, DE, STWERKA, JUERGEN., 3362 BAD GRUND, DE
Year of Publication 10.12.1987
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Year of Publication 10.12.1987
Patent