{TAIL ~ The components}, magnet, reinforcement and plunger, of {HEAD ~ the training device} may be introduced inside the barrel during the molding or the construction of the device or it may be introduced later after the individual parts, handle, barrel and casing, have been made 
{ TAIL ~ The components } , magnet , reinforcement and plunger , of { HEAD ~ the training device } may be introduced inside the barrel during the molding or the construction of the device or it may be introduced later after the individual parts , handle , barrel and casing , have been made
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