wide meter

The main contents are as follows: 1. An improved adjustable current source is used to design a laser driver circuit with hot-plug function; a large photosensitive area photodiode and a wide dynamic range logarithmic converter are used to design an optical power meter.

主要研究内容如下：1.对可调电流源进行改进，设计出了具有热插拔功能的激光器驱动电路；利用大光敏面的光电二极管和宽动态范围的对数运算放大器，设计出了光功率计。

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X-ray thickness meter developed for the flyash scale in pipe is described including the keyboard. display, A/ D, S/ H circuits and transmitter circuit. Discussed also are the characteristics of thickness measurement with wide beam X-ray and the factors affecting measuring precision.

介绍管道灰垢层厚度X射线测量仪的研制，详述仪器键盘与显示、A/D转换与采样保持电路及传感器电路，讨论用连续宽束X射线进行厚度测量的特点和影响精度的诸因素。

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UNIT NINETEENA nanometer is one billionth of a meter ( 3~4 atoms wide 2 ).

一纳米即十亿分之一米 ( 可以排列三四个原子 ).

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The E-ELT's gigantic 39-meter-wide primary mirror will capture 15 times more light than any existing optical telescope, and its images should be 16 times sharper than the Hubble Space Telescope's.

这台宽为39米的大家伙，其主镜聚光能力是世界上现有最清晰的光学望远镜的15倍，形成的图片是哈勃望远镜的16倍。

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JW 3201 Single Channel Benchtop Power Meter is a test instrument with high precision and wide range.

JW3201单通道台式光功率计是嘉慧公司开发设计的高精度、宽量程光功率检测设备.

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Research of the portable leather Moisture Meter with Wide Range

宽范围便携式皮革水份测定仪的研究

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T Alley cropping: Double rows of vetiver with mango trees as 1 meter wide hedgerows.

T巷带种植: 两行香根草和芒果树作为1米宽的隔离带.

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You wouldn't want to encounter this fella while swimming: In February 2009, a National Geographic expedition reeled in a two-meter-wide stingray.

你在游泳时可不想撞上这家伙：2009年2月，国家地理的一支探险队就遇到了这只两米长的黄貂鱼。

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