Building physics, Acoustics, Energy, ...
Walther Bauphysik AG/SIABauphysik, Akustik, Energie
Brühlstrasse 19, 2503 Biel/Bienne
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Building physics, Acoustics, Energy, ...
Walther Bauphysik AG/SIABauphysik, Akustik, Energie
Brühlstrasse 19, 2503 Biel/Bienne
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Lighting, Audiovisual installations, Acoustics, ...
Walther Licht- und Tontechnik AGVeranstaltungsservice
Solothurnstrasse 140, 2504 Biel/Bienne
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