求翻译：到目前为止，全国电声器件专业生产企业约有1000多家和一个研究所——中国电子科技集团电视电声研究所。在电声器件生产企业中扬声器生产厂家占大部分，小部分厂家生产类别较全面，有扬声器、传声器、耳机、送话器、受话器、通信帽、拾声器等（包括附件）。某些中大型骨干企业除生产以上产品外，还生产声传输和声处理设备，成套声系统设备。是什么意思？

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So far, the electro-acoustic devices professional production enterprise more than about 1000 and a research institute - - China electronics technology group TV electro-acoustic research. In electro-acoustic devices in the Enterprise Production speaker manufacturers account for a large part, the smal

So far, the national electroacoustics component specialized production enterprise approximately has more than 1000 and research institute - - China Electronic technology Group Television Electroacoustics Research institute.The speaker manufacturer occupies the majority in the electroacoustical compo

To date, national electro-acoustic devices approximately more than 1000 companies and a Research Institute specializing in the production of Enterprise--Institute of China electronic technology group TV electro-acoustic. Electro-acoustic devices speaker manufacturers accounted for majority of the pr