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500 Naturwissenschaften (1) |
ddc:620 (1) |
621.3 Elektrotechnik, Elektronik (1) |
ddc:624 (1) |
ddc:630 (1) |
500 Naturwissenschaften (1) |
ddc:620 (1) |
621.3 Elektrotechnik, Elektronik (1) |
ddc:624 (1) |
ddc:630 (1) |