The body has a base, {TAIL ~ a rear cover}, a front cover, {HEAD ~ a bearing seat} and a middle liner ring 
The body has a base , { TAIL ~ a rear cover } , a front cover , { HEAD ~ a bearing seat } and a middle liner ring
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH