Original document(7 pages) Authorized document(8 pages) 中文版
    A small moving-coil speed-type geophone has a magnet steel made of high-performance RE permanent magnetic material and a coil skeleton made of great-specific weight non-magnetically conductive material. It has a core diameter of 18-23 mm, height of 23-28 mm, small size, light weight and low cost, and is suitable for seismic exploration.
Application Number
申请号		 01120572 Application Date
申请日		 2001.07.24
Title 名称 Small moving-coil speed-type geophone
Publication Number
公开号		 1399143 Publication Date
公开日		 2003.02.26
Approval Pub. Date Granted Pub. Date 2004.11.17
International Classification 分类号 G01V1/18
Applicant(s) Name
申请人		 Qi Junyuan
Address 地址 072550
Inventor(s) Name 发明人 Qi Junyuan
Attorney & Agent 代理人
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