This image display includes a communication portion for transmittingreceiving image data tofrom a remote image display including a first display portion for displaying image data as a first display image. The data of this composite image, which is used as image data used for printing, is provided to a printing apparatus having an automatic correction feature. The disease tolerance is good particularly with respect to Marsonina rosae. The injector is adapted to deliver gas in a manner that sufficiently maintains uniform supply of the gas in a zone of the CVD system that would exhibit a depleted gas supply absent the injector. The track sections are vertically aligned with the carrier trolleys.