The connection between {HEAD ~ the various parts} is preferably achieved by {TAIL ~ means} of ultrasonic sealing 
The connection between { HEAD ~ the various parts } is preferably achieved by { TAIL ~ means } of ultrasonic sealing
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH