重じゅう力りょく計けい

noun

gravimeter; gravity meter

A scientific instrument for measuring gravitational acceleration, used in geophysics and surveying.

• 重じゅう力りょく計けいを使つかって地ち下かの密みつ度ど分ぶん布ぷを調しらべる。

  They investigate underground density distribution using a gravimeter.