短語詞組短語gravity drainage field 重力驅(qū)油田gravity anomaly field 重力異常場gravity stress field 重力應(yīng)力場gravity ambient field 重力背景場gravity gradient field 重力梯度gravity conjunction field 引力場gravity conjunction field strength 重力場強度gravity magnetic field characteristics 重磁場特征gravity magnetic field 重磁場特征 返回 gravity field