With so much potential contact between the sucker rod string and production ... The ToughMet® alloy is a highly durable, spinodal bronze made of copper, nickel ...
... arbor (a steel rod around which it's coiled as you wind the watch) and at the ... The movement, of iron and gilt bronze; the mainspring barrel is on the ... one percent titanium and 0.2 percent beryllium; carbon accounts for less ...