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发明名称
摘要
PURPOSE:To increase internal loss as well as to make Young's modulus higher and weight lighter by using crystalline polymer as amain material.
申请公布号
JPS5639117(B2)
申请公布日期
1981.09.10
申请号
JP19760038969
申请日期
1976.04.06
申请人
发明人
分类号
H04R7/02;H04R7/12
主分类号
H04R7/02
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代理人
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