helium造句
61. If appropriate helium leak test plan is selected, it will be of benefit to improving detectability and effectively secure titanium vessel safety and reliability.
62. And there he was able to identify the alpha particle as the helium nucleus.
63. It provided a theoretical basis for further research about the cryoadsorption in the interzone temperature of liquid helium and designing and developing a cryopump used in NBI.
64. In this paper the design of surplus payload of aerostat is presented, based on calculation analysis of helium gas service engineering.
65. With these equations we have designed for helium-cadmium lasers a new type of helium replenisher, which has lengthened the life time of a He-Cd laser to over 1000 hours so far.
66. The helium - 3 apparently became trapped when the earth was formed.
67. J_T valve is commonly used in the last cooling stage of a helium refrigerator.
68. As a seal test, sensitivity of helium leak test is higher than other test methods as gas seal and NH3 leak test.
69. The nonrigid helium - filled Blimp was principally developed by Alberto Santos - Dumont ( 1873 - 1932 ) .
70. The superconducting cable, with its cooling line in the magnet cryostat, and the supply and return helium cooling lines will deform due to contraction at low temperature.
71. Small totally enclosed helium compressor is a componend equipment of G-M refrigerator. It is widely used in space environment simulation equipments, vacuum cryopump and vacuum coating equipments etc.
72. The deuteron can fuse with another proton to make a helium 3 nucleus.
73. A pulse appears in the half cycle of current in uniform glow discharge of helium and argon.
74. Since helium is nonflammable, special fire fighting equipment and instructions are not needed.
75. A carrier gas filter system is recommended to be installed on the Helium line ( He ) .
76. In helium gas of 37 Torr, particles with diameter of 100A were obtained. X-ray diffraction presents the pattern analogous to amorphous state.
77. It stands to reason that as supplies diminish, helium will be used more efficiently and investments in recycling technologies will grow.
78. A new method employing model FTV2700 helium ionized gas chromatographic analyzer to analyze the hexafluoroethane(C 2F 6)content in xenon is described.
79. After about 500 million years, the ionized helium in the quasars cooled and slowed enough that dwarf galaxies could begin bulking up again.
80. The working principles and the fundamental technical features of IP-1 ion pump helium detector are discussed.
81. The variation of the hyperfine interaction parameters and the variable mechanism of the sky-green glaze at liquid helium temperature is studied.
82. Another work of this thesis is numerical simulation of overlapped guide - plate stability for helium sub - cooling jacket.
83. Deuterium containing helium absorption of unsaturated uranium deuteride with different composition at varied initial pressure is studied.
84. Being both lighter than air and nonflammable, helium is used to inflate balloons and airships.
85. In 1999 September, this dramatic and detailed image was recorded by the EIT experiment on board the space-based SOHO observatory in the light emitted by ionized Helium.
86. This SIS mixer receiver is reliable,[www.] and can achieve good noise performance even operated at 4.3K temperature with a close cycle helium refrigerator.
87. It is the product of radioactive decay ( see radioactivity ) and is used in helium dating.
88. In the effect of mining, the release of hydrogen and helium changes abnormally, The helium has steady chemical property and strong diffusibility as well as penetrability.
89. MINIMAM UTILITIES: Air-cooled small X-ray tube and gas filled proportional counter have been employed, and the only requirements are AC Power Source and Helium Gas.
90. The stability of a liquid helium free superconducting magnet could be analyzed using the adiabatic stability criterion because there is no cryogen in the system.
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