Distinctive spiral patterns carved into a small jade ring show that China was using complex machines more than 2500 years ago, says a Harvard graduate student in physics. The ring was among the goods ...
A new hydraulic hose handles the same flow and pressure of traditional hose, yet is smaller, more flexible, and lasts longer. For engineers specifying hydraulic hose, SAE J517 traditionally provided ...
Northeastern Sheet Metal Inc. of Goffstown, N.H., recently purchased a spiral duct elbow machine from Standard Sheet Metal Machinery of Cedar Rapids, Iowa. NESM officials said they bought the model SE ...
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