| http://www.w3.org/ns/prov#value | - so as to move the female-thread element 15 into its inoperative configuration, i.e. separated from the thread 14, in order to prevent them from being engaged. [0048] Preferably, the handle 7 is a substantially U-shaped unitary body with a first longitudinal end portion 16 which may be coupled to the chamber by means of the interface element 8 and a second longitudinal end portion 17 bearing the fe
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