| http://www.w3.org/ns/prov#value | - A thermocontact welding method for welding thermoplastic sheets comprising the steps of:providing a thermocontact welding press having platen means and opposing die means, said die means including a seam producing die surface and thermal isolation means movable relative to said die surface; interposing superposed thermoplastic sheets between said platen means and said die means; engaging said plat
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