Mosaic
发表于 2025-3-25 03:47:27
T. TolThe volume contains more than eighty main entries in alphabetical order, dealing with hydrology, rock structure monitoring and soil mechanics in addition to engineering geology. Special topics focus on earth science information and sources, electrokinetics, forensic geology, geocryology, nuclear pla
Impugn
发表于 2025-3-25 07:34:47
Chr. Meyer,T. Tol contains more than eighty main entries in alphabetical order, dealing with hydrology, rock structure monitoring and soil mechanics in addition to engineering geology. Special topics focus on earth science information and sources, electrokinetics, forensic geology, geocryology, nuclear plant siting,
去世
发表于 2025-3-25 13:45:26
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群居动物
发表于 2025-3-25 18:32:36
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生气的边缘
发表于 2025-3-25 21:55:36
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温和女人
发表于 2025-3-26 01:09:35
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PRE
发表于 2025-3-26 05:51:06
High Pressure Mercury Vapour Lamps Having a High Luminance,pplication in the ultra-violet region. This chapter is concerned with high pressure mercury vapour lamps for use in optical equipment. The most important requirements for such a lamp are small dimensions of the luminous surface and high surface luminance. Only with a lamp meeting these requirements
URN
发表于 2025-3-26 09:22:29
Introduction,The high pressure mercury vapour discharge plays an important part nowadays in lighting and also in certain irradiation applications such as in medicine and in blue-printing. For this reason we have thought it worthwhile to sun. up in this book the properties of the discharge, the types of lamps available and the various applications.
CHANT
发表于 2025-3-26 14:42:21
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licence
发表于 2025-3-26 20:41:02
Fluorescent Materials,In Chapter I it has already been explained that in a gas discharge light can be emitted by the excited gas atoms by the transition of an electron from a level of higher energy to one of lower energy. The same process can also take place in the atoms of a solid material.