?测试电刷

... exploratory development 探索研究，探索性研制，应用研究 exploring brush 测试电刷，辅助电刷 exploring coil 测试线圈；探测线圈 ...

?辅助电刷

... exploring shaft 探井 exploring brush 测试电刷 ; 辅助电刷 exploring spot 探测光点 ; 探索光点 ...

?测试弧刷

... brain exploring cannula 脑探测套管, 脑针... exploring brush 测试弧刷,辅助弧刷... exploring mining 坑探 ...