The Rayleigh wave technique is useful and its effect is satisfactory as proved by the tests using RAMAC/GPR in Chang Ba Lead Zinc Mine.
最后作者采用瑞典RAMAC/GPR便携式雷达，对探测的空区进行了检验。 实践证明，瑞雷波探测方法取得了较好的效果。
Just two years earlier, IBM had also developed the first random access disk storage device, the random access Memory for Accounting and Control (RAMAC) 350, so there was a place to store this stuff.
就在两年前，IBM还开发了第一个随机访问磁盘存储设备，RandomAccessMemoryforAccountingandControl (RAMAC) 350，所以有了存放这些东西的地方。
Just two years earlier, IBM had also developed the first random access disk storage device, the random access Memory for Accounting and Control (RAMAC) 350, so there was a place to store this stuff.
就在两年前，IBM还开发了第一个随机访问磁盘存储设备，RandomAccessMemoryforAccountingandControl (RAMAC) 350，所以有了存放这些东西的地方。
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