Abstract: Cement-based composition for the embedding of a boron-containing aqueous solution, said composition being composed of a sulphoaluminate cement optionally comprising gypsum, and of a sand. Process for embedding, by cementation, of a boron-containing aqueous solution in which said aqueous solution is kneaded, mixed with said cement-based composition. Cement grout composition thus obtained.

Abstract: Cement-based composition for the embedding of a boron-containing aqueous solution, said composition being composed of a sulphoaluminate cement optionally comprising gypsum, and of a sand. Process for embedding, by cementation, of a boron-containing aqueous solution in which said aqueous solution is kneaded, mixed with said cement-based composition. Cement grout composition thus obtained.

Abstract: Composite-shell pneumatic craft convertible into a closed box, having a rigid hull and an inflatable float fixed to the edge thereof, a removable rigid panel constituting a lid for the hull containing the deflated float; a profile fixed along the outer edge of the hull comprises a supporting flank and a groove with narrow opening which opens into an upper wall close to the flank; the groove holds a bead joined to flexible skirt of the float; the upper wall, in its part adjacent to the groove opposite to the flank, can support a lip of the removable panel; a portion of the flank cooperates with members for fixing the profile to the hull.

Abstract: Composite-shell pneumatic craft convertible into a closed box, having a rigid hull and an inflatable float fixed to the edge thereof, a removable rigid panel constituting a lid for the hull containing the deflated float; a profile fixed along the outer edge of the hull comprises a supporting flank and a groove with narrow opening which opens into an upper wall close to the flank; the groove holds a bead joined to flexible skirt of the float; the upper wall, in its part adjacent to the groove opposite to the flank, can support a lip of the removable panel; a portion of the flank cooperates with members for fixing the profile to the hull.

Abstract: A device (1) for attaching a flexible linear element to an inflatable tube of an inflatable craft comprising a stud (2) in the shape of a spherical cap with a discoidal mounting base (3) and with a through passage (4) with a cylindrical central channel (5) extended on both sides by two flattened slots (6), this passage (4) emerging in a cavity (7) formed in the stud (2); the end of the flexible linear element (18,29) is made fast to a locking peg (19) that engages with a wedge action in the central channel (5); the locking peg (19) comprises a shank (20) made up of two axial parts (21,22) capable of gripping the end of the flexible linear element and an enlarged head (26) integral with an axial part (21,22) and capable of engaging in the cavity (7) to form a fastening.

Abstract: A device (1) for attaching a flexible linear element to an inflatable tube of an inflatable craft comprising a stud (2) in the shape of a spherical cap with a discoidal mounting base (3) and with a through passage (4) with a cylindrical central channel (5) extended on both sides by two flattened slots (6), this passage (4) emerging in a cavity (7) formed in the stud (2); the end of the flexible linear element (18,29) is made fast to a locking peg (19) that engages with a wedge action in the central channel (5); the locking peg (19) comprises a shank (20) made up of two axial parts (21,22) capable of gripping the end of the flexible linear element and an enlarged head (26) integral with an axial part (21,22) and capable of engaging in the cavity (7) to form a fastening.

Abstract: A pneumatic boat comprising a generally U-shaped float open towards the rear and made up of at least one pneumatically inflatable tube, the rear ends of which are braced by a rear board, a rigid floor disposed at least transversely inside the float and a hull with a V-shaped cross section formed by a flexible canvas fixed to the float and to the rear board and held taut by a longitudinal inflatable keel inserted between said floor and said canvas; the inflatable keel is formed by an elongate enclosure delimited by two substantially flat and approximately parallel main walls extending longitudinally and approximately perpendicular to the floor, these walls being braced by a plurality of flexible links; and this enclosure is inflated to a relatively high pressure.