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Pipe making and metal casting at the Ahrend organ workshop - YouTube
https://www.youtube.com/watch?v=QHWT6kP5AvI&feature=results_video&playnext=1&list=PL91133D0EFC92456A
http://www.fuguestatefilms.co.uk/martinikerk Demonstration of metal casting and organ pipe making at the Ahrend Orgelbau workshop in Leer, Germany. From the ...