.~ Units interchangeable between alternate locations
DEFINITION
Classification: 137/271
(under subclass 269) Apparatus in which the mode of operation can be changed by interchanging plural parts or unitary subassemblies. One of the parts interchanged may be a mere plug or closure.
SEE OR SEARCH CLASS
251, Valves and Valve Actuation,
290, for valve parts, handles or actuators which may be applied in different positions with relation to the devices without any change in the mode of operation.
