| http://www.w3.org/ns/prov#value | - The safety lock 23 (FIGURE is preferably made of metals, such as aluminium, tin plate or brass or the like, and the cylindrical portion of the same is provided with a suitably shaped aperture 27 for the protruding levering portion of the disc of the sealing member and an open space 26 of suitable width for the hinge of the combined device, which latter is placed in a folded condition into said saf
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