In some places they are. It just depends on the preference of the person to use them.
aUTOTECH IS A COMPANY THAT MAKES ELECTRONIC LIMIT SWITCHES AND ROTARY RESOLVERS. tHEY ARE USED IN INDUSTRIAL PLANTS
I believe steam engines are still widely used in China
The outlets are the same, only the voltage is different.
Rotary is used to describe something that has the capability of rotation.
A day.
A rotary system can be used to calibrate flowmeters. Unless you are refering to a rotary telephone system, in which that works differently.
spring type rotary compressor
Rotary and Induction
Rotary seals are mainly used for sealing lubricating oil or grease in standard rotary shaft applications. One can find more information on rotary seals from a variety of websites that offer information on specific tools.
The rotary dial phone used a wheel to dial a sequence of numbers. It went into use as early as the 1890s to overcome the need for an operator to connect all calls. The rotary dial remained in use until the 1980s and beyond.. Even today, many telephone exchanges still support the rotary dial signalling.
A rotary seal would be used in mill work. You will need trainign in order to operate a rotary seal.
A Rotary kiln is a pyroprocessingdevice used to raise materials to a high temperature (calcination) in a continuous process.