(~s, ~ing, ~ed)
To ~ one piece of metal to another means to join them by heating the edges and putting them together so that they cool and harden into one piece.
It’s possible to ~ stainless steel to ordinary steel...
They will also be used on factory floors to ~ things together...
Where did you learn to ~?
VERB: V n to n, V n with together , V, also V n
All the ~ing had been done from inside the car...