| 摘要 |
A geophone having a non-conductive coilform thereby avoiding the disadvantages of conductive coilform damping and allowing closer control of both sensitivity and damping solely through shunt loading of the sensing coil. The coilform is a molded plastic coilform of a high strength lightweight glass filled resin. The coilform is a dimensionally stable and temperature stable thermoplastic. Preferably, the coilform is of polyphenylene sulfide.
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