论文部分内容阅读
1985年3月28日至29日地矿部物化探局在北京组织鉴定了wcc－1型交变磁场退磁仪。该仪器通过了技术鉴定。仪器达到下列技术指标:1．退磁线圈中心最大磁场100mT±5%,工作频率430Hz±15;
March 28, 1985 to 28 Bureau of Geophysical and Geochemical Exploration in Beijing Organization wcc-1-type AC magnetic field demagnetization analyzer. The instrument passed the technical appraisal. Instrument to achieve the following technical indicators: 1. Demagnetization coil center maximum magnetic field 100mT ± 5%, working frequency 430Hz ± 15;