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As an option to your proposal, please include the following additional units:
•1) A quantity of an additional 2, 3 & 4 identical devices
•2) A quantity of an additional 2, 3 & 4 identical mechanics and controls but with different period lengths:
•a) Device 2: Identical to SRX (21 mm)
•b) Device 3: Period length= 22 mm instead of the original 21 mm.
•c) Device 4: Period length= 23 mm instead of the original 21 mm.