Interior sections concertina doorways

https://www.merchantcircle.com/blogs/david-spence-garden-city-ny/2021/7/Entry-Doors-10306-Doors-And-More/2045761

Interior elements concertina doorways Interior pieces concertina hinged doors, occasionally described, confusingly, as 'gliding hinged doors', are literally damaged down in to doors which accumulate when opened