Oliff & Berridge
Gas-impermeable resinous composition
 A refrigerant-transport hose having an inner tube, an outer tube located radially outwardly of the inner tube, and a reinforcing fiber layer interposed between the inner and outer tubes, the reinforcing fiber layer and the inner and outer tubes providing an integral tubular body, and inner tube including a gas-impermeable resinous layer formed of a composition containing a polyamide resin produced by reaction of hexamethylene diamine and an aliphatic dicarboxylic acid having eight to sixteen carbon atoms. 
Tokai Rubber Industries, Ltd.
F C C Y Y Y Y F
F16L C08L C08L Y10T Y10T Y10T Y10T F16L
additional inventional inventional additional additional additional additional inventional
Ichiro Hiroaki
Igarashi Ito