| http://www.w3.org/ns/prov#value | - In the light of such circumstances as described above, the present inventors have further studied, and as a result, they have found that a propylene copolymer containing a specific amount of ethylene unit, having a high triad tacticity, as measured by 13 C-NMR, of the propylene chain consisting of head-to-tail bonds, a specific proportion of inversely inserted propylene units and a specific intrin
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