The inner curve or underside of an arch, vault, or dome. (Opposite of Extrados, which is the outer curve). Intrados Work: The labor and materials required to finish this surface, whether it involves concrete formwork, stone dressing, or plastering.
for something like "NTR" or a specific version number? ntrd111 work
: Once the context is understood, the next step is to identify the objectives of "ntrd111 work." What are the goals? What tasks are involved? The inner curve or underside of an arch, vault, or dome