More specifically, the tube section 20 has at {TAIL ~ each} of {HEAD ~ its ends} a flange 20a which can be tightly fixed to the flanges 12a and 10a by any appropriate fixing means, such as not shown bolts 
More specifically , the tube section 20 has at { TAIL ~ each } of { HEAD ~ its ends } a flange 20a which can be tightly fixed to the flanges 12a and 10a by any appropriate fixing means , such as not shown bolts
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH