光电管

Physics A device, such as a phototube, used to enhance or increase an effect.

扩程器：一种用来加强或者增加效果的仪器，比如光电管

A device, such as a phototube, used to enhance or increase an effect.

扩程器一种用来加强或者增加效果的仪器，比如光电管

By using digital millisecondmeter and phototube instead of manual operation,the improved trilinear pendulum experimental device improves measuring precision.

用数字毫秒计和光电管取代手工操作，使改进后的三线摆实验仪提高了测量精度。

The vibrating wire sensors is excited by single-coil structure and the vibration signal will be feedback through the phototube and MCU.This structure not only simplify the hardware circuit,but also solve the problem of electromagnetic interference which generated by the course of frequency's excitation and pick-up,improve the measurement accuracy and stability of frequency.The application of sweeping frequency makes the vibration wire start-up more stable and reliable.

振弦传感器采用单线圈电磁激振方式，应用光电管结合MCU进行振动信号反馈，不但简化了硬件电路，而且解除了激振和拾振中电磁干扰问题，提高了测量的精度和稳定性；激振中采用的扫频技术也使振弦的起振更加稳定可靠。

Paul Nipkow obtains a patent in Germany for TV, using a selenium cell and a mechanical scanning disk.

保罗·尼普可夫获得德国电视发明专利。他在电视技术中采用硒光电管和机械扫描盘。

A new method of using a color splitting system in place of the filter is introduced. The prism spreads radiational energy over the photods surface. By selecting a photod, the operation wavelength can be selected.

利用三个棱镜构成棱镜组进行分光，色散棱镜将热辐射能展开成连续光谱，传送到光电二极管的有效面元上，通过选择光电管来选择相应的工作波长。

Electronmultiplier cells are superior to ordinary photocells.

电子倍增管比普通的光电管好。

Its electrical conductivity increases when light strikes it, and it can convert light directly into electricity, so selenium is used in photocells (e.g., in light meters and security alarms), solar cells, and photocopier s.

当受到光照时，它的电导率增加，可以将光直接转换成电，所以硒被用于光电管、太阳电池以及测光计。

Its electrical conductivity increases when light strikes it, and it can convert light directly into electricity, so selenium is used in photocells (e.g., in light meters and security alarms), solar cells, and photocopiers.

当受到光照时，它的电导率增加，可以将光直接转换成电，所以硒被用于光电管、太阳电池以及测光计。

Its electrical conductivity increases when light strikes it, and it can convert light directly into electricity, so selenium is used in photocells (e.g., in light meters and security alarm s), solar cells, and photocopiers.

当受到光照时，它的电导率增加，可以将光直接转换成电，所以硒被用于光电管、太阳电池以及测光计。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。