{HEAD ~ a base} mounted on a bottom of said housing and provided with {TAIL ~ a plurality} of tubular portions thereon 
{ HEAD ~ a base } mounted on a bottom of said housing and provided with { TAIL ~ a plurality } of tubular portions thereon
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH