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移相器地感化是将旌旗灯号地相位挪动一个角度。
The role of phase shifter is signal phase shift from another perspective.
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监督干式报警阀压力开闭地行动旌旗灯号。
Monitors the wet warning valve pressure switch's operation signal.
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监督干式报警阀压力开闭地行动旌旗灯号。
Monitors the wet warning valve pressure switch's operation signal.
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