256 S.E.2d 806 (1979)
297 N.C. 454
HARRINGTON MANUFACTURING COMPANY, INC.
v. LOGAN TONTZ COMPANY and Triad Metal Products Company.
Supreme Court of North Carolina.
June 5, 1979.
Pritchett, Cooke & Burch, for plaintiff.
Turner, Enochs, Foster & Burnley, for defendants.
Petition by plaintiff for discretionary review under G.S. § 7A-31. 40 N.C.App. 496, 253 S.E.2d 282. Denied.

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