{HEAD ~ An installation} for collecting oil or fuel spilled on the sea comprising an oil collecting stage, a first tank and a second tank as cascades, a suction pump and {TAIL ~ a final tank} for separation of oil from water all of which are connected with pipes in the set forth order 
comprising
{ HEAD ~ An installation } for collecting oil or fuel spilled on the sea comprising an oil collecting stage , a first tank and a second tank as cascades , a suction pump and { TAIL ~ a final tank } for separation of oil from water all of which are connected with pipes in the set forth order
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