The invention discloses a double helix made of tungsten, having singularly coiled helix tails, the windings of which are positioned next to each other, encasing a core wire, and shielding the same from the acid in the acid bath during the production process of the helix.
Que je vous dise encore, jai quinze ans et demi. Cest le passage dun bac sur le Mékong. Limage dure pendant toute la traversée du fleuve.patents-wipo patents-wipo