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