发明授权
US4414633A Data processing and recording apparatus 失效
数据处理和记录装置

Data processing and recording apparatus
摘要:
A low-cost data logging device, particularly suitable for recording gas meter performance having an electrical transducer to produce an electrical analogue of a parameter to be recorded, a calculator circuit to perform an analysis of measurements of the parameter and a plurality of memories to store the results of the analyses.
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