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US4393720A Ball-circulation type liquid flow rate sensor 失效
球循环型液体流量传感器

Ball-circulation type liquid flow rate sensor
摘要:
A flow rate sensor having an annular passage for enabling a flow of liquid therethrough and a movable member disposed in the annular passage. An intake passage is provided for supplying liquid to the annular passage and an outlet passage, disposed concentrically to the intake passage, enables the liquid to flow out of the annular passage about an outer periphery of the intake passage.
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