1592953498000 1312632483000 term-54381 1616541398151 1312632548000 1616290293294 adlib fitz-online adlib-term-54381 a8195e5c-25a6-3bc4-af6d-7ad482f302c6 2 1 beam-and-girder constructions beam-and-girder constructions term reference term-55948 adlib-term-55948 a0e8c9b8-20d1-3d54-a1c5-fc48dfd4ec9e one-way beam and slab systems