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Plastic pipe fittings and joining technologyplastemart.com, India - Jan 3, 2008Electrofusion welding is used mainly for PE up to 710 mm OD and is useful in narrow trenches. , Infrared welding (up to 225 mm OD) is employed in pipework ...
American Chronicle, CA -Infrared rays penetrate 1 ½ inches into the skin through a process of conversion in which heat is transferred directly to the body without first heating the ...
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