{HEAD ~ The space} provided between brush members 4 a and 4 b allows a mounting strip to be included in {TAIL ~ the housing} 
{ HEAD ~ The space } provided between brush members 4 a and 4 b allows a mounting strip to be included in { TAIL ~ the housing }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL