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本公司专业生产(专利号: ZL 00 2 49441.8)锤击式膨胀螺栓
[19]中华人民共和国知识产权局[51]Int.Cl6
F16B 13/06
[12]实用新型专利申请公开说明书
[21]申请号00249441
[43]公开日[11]公开号0000000
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