the machine further comprising a slide valve and control passages through which {HEAD ~ a working medium} is conducted to and from {TAIL ~ the first and second working chambers}, 
is conducted from
the machine further comprising a slide valve and control passages through which { HEAD ~ a working medium } is conducted to and from { TAIL ~ the first and second working chambers } ,
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH