astronautic造句怎么写

3、Materials with zero thermal expansion coefficients benefit to improve the geometrical stabilities of aeronautic and astronautic structures and electric equipment under great temperature changes.

5、This company is specialized in the production of silver-base and copper-base high phosphorus brazing alloys, as well as high precision copper capillary, which are widely used in refrigeration, electronics, shipbuilding, weaponry and astronautic vehicle, etc.

2、Project management could be applied to military, aeronautic and astronautic, civil and environment, information, manufacturing, administrative and service, etc fields.

1、Light energy absorber in aeronautic and astronautic recovery

4、The silicon carbide fiber and polycarbosilane fiber developed in1990 have come up to advanced world standard. They promise wide application in astronautic field sand national economy.