| http://www.w3.org/ns/prov#value | - A method of introducing an instrument in a body cavity comprising the steps ofproviding a sleeve having a distal end, a proximal end and a lumen between the distal and proximal ends, a seal including a resilient outer seal member having a longitudinal passage of initial cross sectional size therethrough and a resilient inner seal member having a longitudinal passage of initial cross sectional size
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