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1. Because the good airtightness of our valve.

2. Through the study on improving of the airtightness of aircraft cockpit, selection and application in a type of aircraft for XM - 17A non-drying putty were introduced.

3. To raise efficiency of chemical protection, the airtightness in cabin should be strengthened, the ability to ventilate raised, thb sprayer for decontaminating used.

4. Primary considerations were airtightness, thermal mass and high levels of insulation.

5. In this paper, the performance of the airtightness for vacuum coating equipment, the characteristics of leak detection with Helium Mass-spectrometer and the leak detection system are described.

6. The principle of a composite test device for airtightness of automobile compartments and air volume of air conditioners was described.

7. Airtightness as well as uniform electric field is of great importance to the stability of the electrolysis system.

8. By testing the airtightness of shallow silo with two kinds of roof structures, the results show that concrete roof silo is better than steel roof silo.

9. The accurate judgement of airtightness test of gas engineering facilities must depend on Leakage rate, but not on pressure drop.

10. The results showed that recirculation fumigation under film can effectively improve airtightness of the warehouse and control stored grain insects.

11. And when cutting underwater, good effects were achieved because of the Mohaupt effect and airtightness of the hollow metal balls.

12. If any resin other than epoxy-base one is used, the adhesion and airtightness to prevent moisture entrance shall be well examined.

13. The machine has unique track of movement, efficient in removing impurity, excellent in airtightness and enjoys an advanced status of similar products in the country.

14. At present, the technique of vacuum coating has been widely used in our country. But the airtightness of the vacuum coating equipment is poor.

15. The product is LSR O seal, which has better airtightness than elastomer and the other characters of high temperature resistant, anti-aging, anticorrosive, non-toxic and environmental protection.

16. The container used at specified temperature and pressure condition has to meet the requirements of intensity and airtightness, while weld container can completely meet these requirements.

17. Airtightness and anti – collision : Element grooves with dual EPDM rubber and dual high – quality fir strip , durable and effective in airtightness .

18. Features:has good chemic stability, endure the erosion of common chemicals, possesses good airtightness, fire retardance, water-tightness and grinding resistance.

18. Sentencedict.com try its best to gather and build good sentences.

19. The machine has unique track of movement, efficient in removing impurity, excellent in airtightness and enjoys an advanced satus of similar products in the country.

20. This paper introduces two different fumigation processes and two kinds of fumigants popularly used nowadays in the world for bulk grain silos, and discusses some issues with airtightness of the silos.