| http://www.w3.org/ns/prov#value | - Of these, the injection molding process is preferred when such factors as an outer appearance and a need for polishing after molding are taken into account. [0025] In step (A), the thermoplastic resin layer is formed around the core to a thickness which is generally in the range of 0.5 mm to 1.5 mm, preferably in the range of 0.8 mm to 1.2 mm, though not critical.
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