Data chain linked up datum stand and flow stand is the only route.

数据链是沟通基准站和流动站的唯一路径。

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Standard data chain and CRC-16 check mode are used in inquiry control by the central station at the drilling company.

数据网由中心站（钻井公司）采用轮询方式控制，使用标准的数据链路控制规程，和CRC-16校验方式。

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PLC make data acquisition and control of bottom devices, analyzing the feedback parameters of communication and sensor, and the date exchange is carried on in the data chain layer.

PLC完成底层设备数据采集、控制、通讯和传感器反馈参数综合分析，并在数据链路层进行数据交换。

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Natural language-processing experts, visualization and integration engineers, and product managers also play a role in the data analysis chain.

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At the top of the data food chain is the broadband connected laptop (with a 3G chip in it), of which there are 94 million in use, soaking up the equivalent of 22 smartphones of data.

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For the study, the researchers used two data sets from chain stores and interviewed managers of nine convenience store chains.

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