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1. In the ethyne molecule, a double bond links together the two carbon atoms.

2. Acetylene (ethyne)Simplest alkyne, C2H2. A colourless, flammable, explosive gas, it is used as a fuel in welding and cutting metals and as a raw material for many organic compounds and plastics.

3. There is neither residue problem with ethyne in grain fumigated, nor effect on both quality of grain and germination capacity of seeds.

4. The application of nitrous oxide ethyne flame atomic absorbing spectral method to continuous measure the content of Nb and Mo in 7715D high temperature titanium alloy is studied.

5. Ethyne has two kinds of downstream products. One is the same downstream products that can be gotten from ethylene and propylene, such as chloroethylene, vinyl acetate and acrylic acid, etc.

6. It is characterized by using dry air or nitrogen, oxygen and ethyne as reaction gas.

7. In this article, the measurement method of hydrocarbon especial ethyne concentration in air separation by using the GM600FID gas chromatogram are introduced.

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8. The present experimental investigation attempts to understand the suppressing effect of metal mesh construction on deflagration waves of premixed ethyne air mixture in unconfined space.

9. It is shown that the particle diameter increased with the content of phenyl ethyne or polymer, but methyl styrene has almost no effects on particle diameter.

10. Natural gas is important chemical material and is used as feed to produce synthesis ammonia, methanol and ethyne.