求翻译：根据调度指令，确定接收物料来源，打开812界区相应收料阀，确认其他两条收料线控制阀关闭（防止串料），检查812界区界区吹扫阀关闭、界区盲板盲通状态是什么意思？

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According to the dispatch instruction to receive material sources, open 812 territories the receiving the valve to verify that two other articles from the line control valve is closed (to prevent string material), the 812 Territories Territories blow-off valve is closed, Territories blind blind pass

According to the dispatcher instruction, determined the receive material originates, turns on 812 area receivable material valve, confirmed other two receive the material line control valve closure (to prevent string material), inspects 812 area areas to blow sweeps the valve closure, the area blind

According to the control order, determine the source items are received, open the 812 area receiving valves, confirmed the other two collection lines control valve closed (prevention), check the 812 area area close the purge valve, blind pass area closure status

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