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...systems Electrical resistance: medium cost and output, poor versatility, preforms required Radio-frequency induction: high cost and output, preforms required Dipping bath: medium cost, low output and versatility Soldering iron: hand-feeding gives low cost and output, but high versatility Finishing – flux and residual solder are removed before inspection. Materials:...

...systems are more expensive and less versatile, since they are usually only economic for the high volume production of one particular assembly. The dies and tooling in an operating head can be changed in a few minutes, and complete operating heads for the production of entirely different assemblies can be fitted in approximately 10 min. The holding fixture for the...

...system and the boiling point of electrolyte. Removal rates are 5–10 times those of conventional grinding for hard materials; typically 0.15 cm3 min–1 (100 A)–1. Main use of process is the shaping and sharpening of WC cutting tools, although it has been used for sharpening hypodermic needles and machining thin, fragile, honeycombed structures. Materials: Almost any...

...think of for geological wonders, but it is amazing what you can find in a shopping mall. MARCUS BADGER: Banks use rocks to convey a sense of reliability and permanence. ANNE JAY: And local authorities use attractive building stones to put on their public buildings and in public spaces. MARCUS BADGER: Sometimes retailers will use rocks to convey subtle messages about the...