| http://www.w3.org/ns/prov#value | - If the incoming signal is an output then the two switches C2 and C3 are open and the switch C1 is closed, whereupon the signal from the E.I. block 14 cannot access the library device, but can access the C.F.D. block 18 via lead 92, while the corresponding output signal from the library device can return to the I.I. block via lead 94 and access the C.F.D. block via the lead 90.
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