| http://www.w3.org/ns/prov#value | - A Boehm system clarinet of the type having a wooden body and A, A flat, and B flat keys each including an actuating spatula and a pad bearing cup, characterized by:a) a first auxiliary needle bearing attached to said body in rough proximity to the spatulas of the A and A flat keys;b) a second auxiliary needle bearing attached to said body in rough proximity to the spatula of the B flat key;c) an a
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