Alpine-Mehrschicht-Schlauchfolienanlage auf der K'01 (Düsseldorfer Kunststoffmesse)
No machine-readable author provided. <a href="//commons.wikimedia.org/wiki/User:SB68Manm~commonswiki" title="User:SB68Manm~commonswiki">SB68Manm~commonswiki</a> assumed (based on copyright claims).
No machine-readable source provided. Own work assumed (based on copyright claims).