Assertion: heckel system bassoon | /r/HasProperty | wilhelm heckel
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text: Companies that manufacture Heckel-system bassoons include: Wilhelm Heckel, Yamaha, Fox Products, W. Schreiber & Söhne, Püchner, The Selmer Company, Linton, Moosmann Kohlert, Moennig/Adler, B.H. Bell and Guntram Wolf.