GavenEconomist⁵³⁵⁸¹⁺¹ 基本例句 n.加文¹⁰⁰ In text particular introduced the basic principium of testing and analysed different testing method been applied range. Gaven some methods of fast orientation malfunction in practice testing. 详细介绍其测试基本原理，分析了不同测试方法适用的范围，给出了实际测试中一些快速定位电缆故障的有效方法。 cnki