A method of assembling a turbine engine includes defining a first chamber and defining a second chamber. The real-time clock apparatus includes a crystal oscillation circuit, a high-speed timing circuit for dividing an output of the crystal oscillation circuit, a low-speed timing circuit for dividing an output of the high-speed timing circuit, and an interface unit for exchanging a signal with an external apparatus. The second limiting portion and the second fixing portion are respectively located corresponding to the first limiting portion and the first fixing portion for preventing the circuit board and the case from moving to all directions. , a polypeptide characteristic of a pathogenic microorganism or associated with a tumoral disorder, a DNA plasmid encoding a peptide or a polypeptide characteristic of a pathogenic microorganism or a tumor-associated antigen, or an hapten coupled to a carrier molecule. The safety is formed by a trigger safety to prevent accidental firing of the weapon and is fit to the combination of a rectangular plate in whose base there is a mechanism release window corresponding to the track of the trigger having in addition some bores in its corners in eyelet form that serve as guides for the course and movement of the trigger safety.