To this effect, {HEAD ~ means} for sensing {TAIL ~ an abnormal condition} of the machine tool is provided in the vicinity of an essential portion of the machine tool 
for sensing
To this effect , { HEAD ~ means } for sensing { TAIL ~ an abnormal condition } of the machine tool is provided in the vicinity of an essential portion of the machine tool
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH