论文部分内容阅读
1 DC90A型便携式单体液压支柱工作阻力检测仪完成单位煤科总院开采所鉴定日期1991-01-20 技术水平国内先进该仪器可在工作面快速进行单体支柱工作阻力检测。采用电阻应变原理,可与YJK4500本
1 DC90A portable single hydraulic props work resistance detector unit Coal Institute of the Institute of Identification Date 1991-01-20 Technical level Domestic advanced The instrument can be quickly carried out in the face of the work of the single pillar resistance test. Using the principle of resistance strain, with the YJK4500 this