helium造句
121. The discovery also explains why helium is found in radioactive mineral deposits.
122. The cryogenic ground support equipment (CGSE) is used to cool down the second stage alpha magnetic spectrometer ANS02 magnet and to fill the superfluid helium into the magnetic Dewar of AMS02.
123. Alpha particles -- helium nuclei -- were being hurled through the tube, in which an artificial mist had been created.
124. Helium can provide a protective atmosphere in the production of reactive metals, such as titanium and zirconium.
125. The feasibility of using quadropole mass spectroscopy to differentiate helium and deuterium was discussed.
126. Nuclear fusion has created helium, carbon and other chemical elements.
127. Active magnetic bearings are important parts of helium turbines in the high temperature gas-cooled reactor(HTGR) power conversion unit.
128. The advanced leakage test technology of helium leakage test can't be extensively spreaded, due to low efficiency, high cost of the existing leakage test.
129. The helium mass spectrometer leak detecting technology for a large vacuum chamber with the complex construction is described. Some problems in operation are shown and analyzed.
130. Alpha particles positively charged helium nuclei obtained from natural radioactive decay.
131. One safety catch in his design is its helium coolant.
132. When a sunlike star exhausts its hydrogen fuel and then its helium, it turns to its carbon and oxygen.
133. As a kind of excellent cryogen with superconductivity, liquid helium of high purity has been widely used in many fields, such as industry and aerospace .
134. The image was recorded in extreme ultraviolet light emitted by ionized Helium, an element originally identified in the solar spectrum.
135. Helium and neon measurements provide further evidence that the earth was not completely melted.
136. Although helium is nontoxic and inert, it can act as a simple asphyxiant by displacing the oxygen in air to levels below that required to support life.
137. The parade was suspended from 1942 to 1944 because rubber and helium were needed for World War II, making this parade the 85th.
138. Gaseous helium is used as an inert shielding gas in metal arc and laser welding.
139. Objective To observe the efficacy of helium neon laser in preventing chemical phlebitis.
140. Any of the six chemical elements that make up the rightmost group of the periodic table as usually arranged: helium, neon, argon, krypton, xenon, and radon.
141. To do that, the instruments are positioned on top of a tank filled with superfluid liquid helium.
142. He tied them to a lawn chair and filled them with helium.
143. Gaseous helium is inert, colorless, odorless, non corrosive, and nonflammable.
144. The helium purification system of the Helium Test Loop was constructed for demonstrating test of the High Temperature Gas-cooled Reactor.
145. Some of this energy congealed into particles, which assembled into light atoms like hydrogen and helium.
146. The bizarre behavior of superfluid helium has attracted many able theorists.
146. Wish you can benefit fromand make progress everyday!
147. A nonrigid, buoyant airship. Modern blimps use helium instead of hydrogen to maintain buoyancy.
148. An experimental study on a two-stage G-M refrigerator operating in the liquid helium temperature region with the cold regenerator outside of the displacer has been studied.
149. After hydrogen, the atom with the simplest structure is that of helium.
150. Determination of true relative density of coal by helium replacement method was researched in this paper.
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