translate English to French: Historically, significant amounts of valuable service information were never incorporated into updated service manuals, and only by also studying the supplementary information and bulletin CDs can these information gaps be bridged.
Historiquement, le nombre significatif d’informations de service n’ont jamais étés inclues dans les manuels de service, et seule l’étude des CD de bulletins et informations permet de les obtenir.