{TAIL ~ The electromagnetic means} 28 is built in {HEAD ~ the form} shown in FIGS 6 and 7 by assembling the field 30, coil assembly 32 and protective member 112 by the following procedure 
{ TAIL ~ The electromagnetic means } 28 is built in { HEAD ~ the form } shown in FIGS 6 and 7 by assembling the field 30 , coil assembly 32 and protective member 112 by the following procedure
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