1. Butt welding by creating an electric arc between the two pieces which melts and joins them; used for joining segments of metal pipe
   - flash welding

Type of: butt welding, butt-welding

• regression line
• regression of y on x
• regression toward the mean
• regressive
• regret
• regretful
• regretfully
• regrets
• regrettable
• regrettably
• regroup
• regrow
• regrowth
• regular
• regular army
• regular convex polyhedron
• regular convex solid
• regular dodecahedron
• regular expression
• regular hexagon
• regular hexahedron
• regular icosahedron
• regular octahedron
• regular payment
• regular polygon