251 S.E.2d 469 (1979)
296 N.C. 411
HARRINGTON MANUFACTURING COMPANY, INC.
HARRINGTON MANUFACTURING COMPANY, INC.
v.
POWELL MANUFACTURING COMPANY, INC.
Supreme Court of North Carolina.
January 4, 1979.Grier, Parker, Poe, Thompson, Bernstein, Gage & Preston, for defendant.
Pritchett, Cooke & Burch, for plaintiff.
Petition by Defendant for writ of certiorari. (776SC602). 38 N.C.App. 393, 248 S.E.2d 739. Denied.