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ИШ MID-FUSELA INTERFACE E WING INTERFACE Figure 3-15.— Aft fuselage shell structure. LOW-PRESSURE-TURBOPUMP SUPPORT UPPER THRUST SHELF * DIFFUSION-BONDED TITANIUM е BORON-EPOXY REINFORCED ORBITER/EXTERNAL TANK ATTACHMENT INTERFACE Figure 3-14.— Aft fuselage thrust structure. 3-18 The body flap and combination rudder/speed brake. Three redundant 20 684-kN/m? (3000-psi) systems supply.