Preferably, {HEAD ~ the invention} relates to {TAIL ~ a device} wherein the device comprises a guiding rail and an interconnecting bar 
relates to
Preferably , { HEAD ~ the invention } relates to { TAIL ~ a device } wherein the device comprises a guiding rail and an interconnecting bar
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH