| http://www.w3.org/ns/prov#value | - a cage with a form adapted so as to slide inside the guide tube, and to house the piston rod and the collar thereof, the said cage including towards one of its ends, the so-called rear end, an internal device for locking the collar of the piston rod capable of deforming radially and, towards its other forward end, a front wall for stopping the propulsion spring and for contacting the means of lock
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