Description: 122 / (109) Fluid Treatment And Handling (127) External Boiler Circuit (128) Boiler Water Feed (129) With Heating (130) By Exhaust Steam
Hierarchy/Derived subclasses
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search just 122/130This will show what classes derive from the input. Ex: entering 78/35 shows the derived classes and the search that can be used to find
patents in those subclasses.