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Pumps designed for delivering and withdrawing liquids to and from laboratory equipment at pre-established accurate flow rates simultaneously and/or sequentially. These pumps typically consist of a syringe pump with a piston mechanism for propelling and withdrawing liquids (e.g., sample solutions). The pumps are capable of delivering and withdrawing large and/or small volumes of liquids through one or several channels; they are used for liquid management (e.g., sampling injection) in clinical laboratories and other health facility areas.
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