This paper deals with the gasdynamic process of the spherical piston in a weak field of gravitation.
本文研究在弱引力场中活塞球对称运动的气体动力学过程。
The basic principle and the improvement of Santana spherical cast iron piston ring chromium plating technology is briefly introduced.
概要介绍桑塔纳球墨铸铁活塞环镀铬工艺的原理和改进过程。
The basic principle and the improvement of Santana spherical cast iron piston ring chromium plating technology is briefly introduced.
概要介绍桑塔纳球墨铸铁活塞环镀铬工艺的原理和改进过程。
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