DC machines can be classified as self-excited, separately excited, permanent magnet (PM), and brushless. Self-excited machines can be further classified as shunt, series, and compound. Compound ...
A high-viscosity, rigid compound, Tra-Bond 216R01 has a lap shear of 3,600 psi with a room-temperature cure and 4,500 psi with a 65°C heat cure. A high-viscosity, rigid compound, Tra-Bond 216R01 has a ...
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 ...
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