| 摘要 |
An externally actuated valve assembly especially suitable for use in liquid chromatography is disclosed herein. This assembly is designed to control the flow rate of a fluid through an elastomeric conduit by acting on a relatively long section of the conduit in a way which varies the cross-sectional configuration of its passageway, preferably in a uniform manner along the entire length of the passageway, in order to vary the flow rate of fluid therethrough a corresponding amount.
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