| http://www.w3.org/ns/prov#value | - Patent US5373855 - Two-channel needle for withdrawing body fluids - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More ??Sign inAdvanced Patent SearchPatentsA two-channel sampling needle is designed for withdrawing body fluids, such as blood or tissue fluid, has two essentially parallel cannulas, the first cannula being provided with an insertion needle which may be removed after
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