这项高度机密技术的一张老黑白照片——或许是同类照片中现存的唯一公开的图像——显示了一批管子和近乎小卡车大小的低矮机箱。
An old black-and-white photograph of the sensitive technology - perhaps the only image of its kind in existence publicly - shows an array of pipes and low cabinets about the size of a small truck.
测试这个系统的性能，该小组坐了两个不同的孔，一个是上下大小相同的管子，另一个是上小下大的。
To test how the system works, the team tried making two different kinds of pores - some that were uniformly sized tubes, others that had a narrow bottleneck at one point and then widened out.
异径管也叫大小头，两端管口直径不同，用于连接不同直径的管子或法兰进行变径。
Different-diameter pipe size head, also called tube diameter at different, used to connect different diameter of pipe or flange diameter changes on.
在这些实验中，他们将头发一般粗细的管子，从患者头颅顶部约硬币大小的孔洞伸入。
In the experiments, they thread a tube about the width of a hair through a hole the size of a quarter on top of a patient's skull.
在这些实验中，他们将头发一般粗细的管子，从患者头颅顶部约硬币大小的孔洞伸入。
In the experiments, they thread a tube about the width of a hair through a hole the size of a quarter on top of a patient's skull.
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