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一种能取代传统键条链轮带动测速发电机测速的新产品一ZM—I型非接触式测速装置在南通航海仪表厂研制成功。
A new type of ZM-I non-contact speed measuring device capable of replacing the traditional key chain sprocket to drive the tachometer speed measurement was successfully developed at Nantong Navigation Instrument Factory.