“specific gravity”的概念、定义、翻译、参考文献-科学参考

单词	specific gravity
释义	specific gravity [spǝ`sif·ik `grav·ǝd·ē] ^MECHANICS The ratio of the density of a material to the density of some standard material, such as water at a specified temperature, for example, 4°C or 60°F, or (for gases) air at standard conditions of pressure and temperature. Abbreviated sp gr. Also known as relative density.
随便看	space cone space coordinates spacecraft spacecraft ground instrumentation spacecraft launching spacecraft propulsion spacecraft tracking space current space curve spaced antenna power loss power meter power of the continuum power oil power output power output tube power pack power package power plant power rating power ratio power reactor power rectifier power relay power resistor

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