At the hearing, the appellant called an expert witness, Mr. Dennis L. Rhen, Manager of the Engineering Services at A. Stucki Company of Pittsburgh, the manufacturer of the goods in issue.
L'appelant a cité comme témoin à l'audience M. Dennis L. Rhen, gérant des Services d'ingénierie de la A. Stucki Company de Pittsburgh, qui est le fabricant des marchandises en question.