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 {TAIL ~ the socket} by ultrasonic welding 
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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 { TAIL ~ the socket } by 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 REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH