网槽液面记录仪 vat level recorder
液面控制记录仪 level cotroller and recorder
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起下钻之前，检查泥浆罐液面、流量计和记录仪，并调整确定所有的报警功能。
Before trips, examine Pit Level and Flow Rate Instruments and Recorders and ActuateAlarms to determine that all are functioning.
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