Associated Press Writer CAIROâEgypt displayed on Monday newly discovered tombs more than 4,000 years old and said they belonged to people who worked on the Great Pyramids of Giza, presenting the discovery as more evidence that slaves did not build the ancient monuments.
Wave soldering is used for both through-hole printed circuit assemblies, and surface mount.In the latter case, the components are glued onto the surface of a printed circuit board (PCB) by placement equipment, before being run through the molten solder wave.lux in the wave soldering process has a primary and a secondary objective. The primary objective is to clean the components that are to be soldered, principally any oxide layers that may have formed. There are two types of flux, corrosive and noncorrosive.
  Solder is a fusable metal alloy Solder is a metal alloy used to join metal workpieces and having a melting point less than that of what you're joining. Solder is used â¦ to connect electrical components together so they'll work in a circuit.It is also used for joining plumbing fixtures and pipes and fittings.tep 2) When the soldering iron is hot enough, tin the tip of it with solder or t â¦ inning compund. Step 3) Heat the parts that are going to be joined. DO NOT MOVE THE SOLDERING IRON. Step 4) Slowly push the solder into the heated area. Sing 1 2 3 4 5 once I caught a fish alive while you are doing this.