When a backing weld or a melt-thru weld is to have a(n) ____________________ finished convex contour, this is indicated by adding the convex contour symbol and the finish abbreviation to the backing, back, or melt-thru symbol.

Name: When a backing weld or a melt-thru weld is to have a(n) ____________________ finished convex contour, this is indicated by adding the convex contour symbol and the finish abbreviation to the backing, back, or melt-thru symbol.
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The Answer is mechanically

When a Backing Weld or a Melt-Thru Weld Is to Have