bifrequency 中文意思是什麼
bifrequency
解釋
雙頻率-
The company had been produced various gps manufactures since the company established, and its aim is that to satisfy different customers demands and make great effort to create domestic superior gps product. now the company not only produces portable gps surveying system of decimeter - precise, but also producesthe dynamic state rtk4000 - bifrequency surveying system of millimeterprecise
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