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德国(乐器)大师质量商标协会(German Master Quality)总部设在德国的威斯巴登,是一个会员俱乐部性质的质量认证协会。协会以推动“大师级”乐器制作及推
Germany Master (Musical Instrument) The German Master Quality Association is headquartered in Wiesbaden, Germany. It is a member club quality certification association. Association to promote “master ” instrument production and push