significantly different than a base. Note that in Table III the lunar cut-off values are almost always well below 1 manhour per kg and that therefore, if imports are required, they are not likely to be confined to high-value products like computer chips. Thus we are justified in observing that the technical transition between a base and a settlement or colony occurs when the base reaches a productivity level high enough to become self-sufficient on indigenous resources, requiring import only of high-value speciality items and volatile resources not locally available.
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