在灰褐色的砂粒中寻找微小的纯金颗粒是困难的。美国Gardiner电子检测仪器公司最近研制成功了一种新仪器,能够在砂粒中探寻纯金颗粒及金块。并已获得了美国专利。这种新仪器的灵敏度很高,像针尖那样微小的金粒能够很容易的检测出来。最大探测范围是17英尺。仪器重量很轻。作过这样的 Finding tiny, pure gold particles in taupe grit is difficult. The United States Gardiner electronic testing equipment company recently developed a new instrument, able to explore the gold particles in the sand and gold nuggets. And has obtained the United States patent. The new instrument is highly sensitive and tiny gold particles like a needle tip can be easily detected. The maximum detection range is 17 feet. The instrument is light weight. Made like this