335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets, subclass 239 for electromagnets having armatures and time delay means.
(electromagnets; having; armatures) (Electricity: Magnetically Operated Switches, Magnets, and Electromagnets; subclass; 239 for electromagnets) Context(Electricity : Magnetically Operated Switches , Magnets , and Electromagnets subclass,List([5, 87))):(time delay; means; )
Electricity
electromagnets Electricity: Magnetically Operated Switches, Magnets, and Electromagnets Magnetically Operated Switches , Magnets , and Electromagnets subclass,List([5, 87))):(time delay
having subclass means
armatures
239 for electromagnets