placing against said one surface of said base a first molding block having a plane surface and at least one first recess formed in said plane surface, said first recess having {HEAD ~ a configuration} for molding said projection and having an aperture opening out of said first recess through said plane surface which has a cross sectional area larger than that of said first opening in {TAIL ~ said base plate}, said first molding block being placed at a position to cover said first opening with said aperture of said first recess 
placing against said one surface of said base a first molding block having a plane surface and at least one first recess formed in said plane surface , said first recess having { HEAD ~ a configuration } for molding said projection and having an aperture opening out of said first recess through said plane surface which has a cross sectional area larger than that of said first opening in { TAIL ~ said base plate } , said first molding block being placed at a position to cover said first opening with said aperture of said first recess
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