Common welding joint types – (1) Square butt joint, (2) Single-V preparation joint, (3) Lap joint, (4) T-joint. The cross-section of a welded butt joint, with the darkest gray representing the weld or fusion zone, the medium gray the heat-affected zone, and the lightest gray the base material. ... لحام في وسط من الغازات ...
a common measurement of market performance. It is not possible to invest directly in an index. Past performance is not a guarantee of future results. Investments in mutual funds will fluctuate with market condi-tions, and you may have more or less than the original amount invested when you sell your shares.