Materials and Components
The most important set of specifications of transformer oil include

dielectric strength and viscosity
viscosity and flash point
dielectric strength and flash point
flash point and viscosity

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Materials and Components
Electrical contact materials used in switches, brushes, relay must possess

Low thermal conductivity and low melting pointL
Low thermal conductivity and high melting point
High thermal conductivity and low melting point
High thermal conductivity and high melting point

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