| http://www.w3.org/ns/prov#value | - The locking device 50 can be any mechanical device that further restricts a fluid flow through a catheter. ???Restriction??? is herein defined as a decrease in the fluid flow by up to about 20%, preferably by up to about 40%, more preferably by up to about 80%, and even more preferably by up to about 99%. ???Fluid??? is herein defined as anything that flows, including especially urine, but also ot
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