7 Mechanical devices for conveying and/or metering coating media, in particular powder and/or wet paint; the aforementioned goods also as individual parts; pneumatically and/or electrically operable systems and devices for atomizing, spraying or nebulizing fluids; coating plants, in particular for powder and wet paint, and parts thereof, such as manual and automatic spray guns for atomizing, spraying or nebulizing certain media, control and regulating devices; all the aforesaid parts, devices and plants also in an electrostatic version; pumps, in particular powder and/or wet paint pumps, powder injectors, suction jet pumps, conveyors for conveying powder and/or wet paint