... pre ure-operated switch 压力操纵开关 pre ure-operated valve 压力操纵阀 pre ure-reducing controlling device 减压操纵装置 ...
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pre ure operated deluge valve 加压式雨淋阀
pre ure-lo operated deluge valve 压力损失动作的雨淋阀
air-operated pre ure control valve 气动式压力控制阀
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