What does the nonstandard impeller of water pump mean?
A simplified statement that nonstandard parts are nonstandard parts. In the field of machinery, there are often some general parts for production and processing convenience and reduce production costs,
Establish a standard series of parts for users to buy. Water pump impeller is the same, you are talking about non-standard parts, it requires custom processing.
The impeller of water pump has the national unified standard, nonstandard is non national standard
