| http://www.w3.org/ns/prov#value | - ove therethrough along said curved path from said back end to said front end, said slot being sufficiently wide to allow said tube or other item to be passed therethrough when said tube or item is squeezed or otherwise deformed in a way which reduces its cross-sectional dimension, whereby to separate said blade from said tube or item after the latter has been inserted into the blade; and means for
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