Seam 04 : Any permanent attachment of two or more chemical-protective clothing materials, excluding external fittings, gaskets, and suit closure assemblies, in a line formed by joining the separate material pieces
NFPA 1994 Standard on Protective Ensembles for First Responders to CBRN Terrorism Incidents, 2007 ed. http://media.bmt.org/bmt_media/resources/39/NFPA19 94.pdf, (Std: Prot Ens for First Resp to CBRN Teror Incid - Amer) {438 NFC}