At least an inner tube and an outer tube of a double tube, which forms an insertion section of an endoscopic injector, are formed of different kinds of plastic materials, and the outer tube is formed of a material with a higher rigidity than a material of the inner tube. Thereby, there are provided an...http://www.google.es/patents/US20080208127?utm_source=gb-gplus-sharePatente US20080208127 - ENDOSCOPIC THERAPEUTIC DEVICE AND DOUBLE TUBE FOR THERAPEUTIC DEVICE
ENDOSCOPIC THERAPEUTIC DEVICE AND DOUBLE TUBE FOR THERAPEUTIC DEVICE
