What does Innenlader mean in English?

Innenlader is the German logistics term for in-loader — a specialist semi-trailer in European road freight whose cargo sits inside the lowered well between the wheel arches rather than above a raised platform. The word translates directly as "inner loader." In English-language freight markets, particularly in Austria and German-speaking logistics sectors, the same vehicle is most commonly referred to as a Flatliner — a name that comes from the flat concrete pallets used as the cargo base inside the lowered frame section.