INCLUDING MEANS FACILITATING PART REPLACEMENT OR REPAIR OTHERTHAN SOLID, EXTENDED SURFACE, FLUID CONTACT MEANS:
(under the class definition) Apparatus having structure disclosed as making it easier to repair or replace parts of the apparatus which deteriorated or is inoperative.
SEE OR SEARCH THIS CLASS, SUBCLASS:
122, 171+, 190, and 211+, for this feature in a solid, extended surface, fluid contact means.