backpressure regulator self-contained是什么意思?

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backpressureregulatorself-contained是什么意思?backpressureregulatorself-contained是什么意思?backpressureregula

backpressure regulator self-contained是什么意思?
backpressure regulator self-contained是什么意思?

backpressure regulator self-contained是什么意思?
自动调节的反压力调节阀