| http://www.w3.org/ns/prov#value | - The CO2 gas laser is preferred for use in thermowelding plastic materials as the photons in the beam generated by the laser have wave lengths which are readily absorbed in thermoplastic materials such as the copolymer of vinyl chloride and polyvinyl chloride commonly known as "saran, in the ethylene vinyl acetate copolymer, and in polyethylene.
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