To detect engrams, Hubbard adopted a battery-powered galvanometer with a needledial wired to two empty tin cans.
为了探测记忆印痕，哈伯德采用了一种电池驱动的电流计，它有一个指针可调节，连接着两个空罐头盒。
2
Firstly, the control process analysis of man-machine interface design, finally compiled the corresponding software 12 blocks straight needledial filling machine control process.
首先对控制过程进行分析，对人机界面设计，最后编制相应的系统软件实现12针拨块直线灌装机的控制流程。
3
The needle on the dial went right around to fifty feet, which was as far as it could go, and there it stuck.