{TAIL ~ This invention} relates to {HEAD ~ fastening sheets} of deformable material together and more particularly to clinch joints and methods and apparatus for forming clinch joints of both the leak proof and lanced type joints 
{ TAIL ~ This invention } relates to { HEAD ~ fastening sheets } of deformable material together and more particularly to clinch joints and methods and apparatus for forming clinch joints of both the leak proof and lanced type joints
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