He promised to come but hasn't tumed up yet.
他答应来，但到现在都还没出现。
Liquid level transmitter of pump tank, concentration analyzer, crossflow regulating valve and automatic crossflow model were improved and PID parameters of regulating loop were tumed.
介绍了干吸工序自动串酸系统存在问题及解决措施，针对泵槽液位计、酸浓度分析仪、串酸调节阀、自动串酸模式存在的问题做了相应改进，并整定了调节回路PID参数。
Liquid level transmitter of pump tank, concentration analyzer, crossflow regulating valve and automatic crossflow model were improved and PID parameters of regulating loop were tumed.
介绍了干吸工序自动串酸系统存在问题及解决措施，针对泵槽液位计、酸浓度分析仪、串酸调节阀、自动串酸模式存在的问题做了相应改进，并整定了调节回路PID参数。
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