According to {HEAD ~ the invention}, {TAIL ~ the means} of fixation of the said tank to the said engine unit are preferably deformable 
According to { HEAD ~ the invention } , { TAIL ~ the means } of fixation of the said tank to the said engine unit are preferably deformable
OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH