People has so big reserves to feel glad to can lighting ice, but want exploitation to have not little difficulty however. Because of them sleep deeply is in marine, the person cannot go down to extract. This needs a kind of effective dose that break ice, in the robot operate next sea floor that take a person, destroy the structure that can light ice with the agent that break ice, can gather flammability gas centrally again at the same time. This is the task of 21 centuries of course.



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