“gravity bar”的概念、定义、翻译、参考文献-科学参考

单词	gravity bar
释义	gravity bar [`grav·ǝd·ē ´bär] ^{MINING ENGINEERING} A 5-foot (1.5-meter) length of heavy half-round rod forming the link between the wedge-oriented coupling and the drill-rod swivel coupling on an assembled Thompson retrievable borehole-deflecting wedge.
随便看	vector equation vector field vector function vector graphics vector gunsight vectorial structure vector impedance meter vector meson vector model of atomic structure vector momentum vector point function vector potential vector power vector-power factor vector processing vector product vector resolver vector space vector steering vector sum vector table vector voltmeter vee antenna vee path veer

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