The hold ring includes a groove in a ring like shape for constituting a burr storing space at an outer periphery thereof and is welded to {HEAD ~ the inner periphery} of the socket by {TAIL ~ ultrasonic welding} 
The hold ring includes a groove in a ring like shape for constituting a burr storing space at an outer periphery thereof and is welded to { HEAD ~ the inner periphery } of the socket by { TAIL ~ ultrasonic welding }
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 OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL