| http://www.w3.org/ns/prov#value | - For the purpose of solving such a problem as mentioned above, methods for polymerizing olefins in the suspension or vapor phase polymerization system using catalysts formed from transition metal compound and organoaluminum oxy compound have been proposed, for example, in the foregoing Japanese Patent L-O-P Publications Nos. 35006/1985, 35007/1985 and 35008/1985, wherein at least one of the two cat
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