The operation of {HEAD ~ an injection molding device} and the forming of sound carriers in molding {TAIL ~ cavities} bounded by molding plates are known per se and consequently need not be discussed in more detail herein 
The operation of { HEAD ~ an injection molding device } and the forming of sound carriers in molding { TAIL ~ cavities } bounded by molding plates are known per se and consequently need not be discussed in more detail herein
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