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graduation error | 刻度误差
| See ERROR OF GRADUATION. | 参见error of graduation(刻度误差)。 |
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gram(me) | NULL | A CGS unit of mass equal to one one-thousandth of a KILOGRAMME. | NULL |
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granite | 花岗岩
| Light-coloured, acidic IGNEOUS ROCK mineralogically composed primarily of QUARTZ and potassium-sodium rich feldspars in which the mineral ... more | 一种淡色的酸性火成岩石。其主要矿物成分是石英和钾、钠含量很大的长石。具有肉眼可见的显晶结构石... more |
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graphic control survey | 图解控制测量
| See SURVEY. | 用于下述目的的平板仪概略测量：(a) 确定海道测量标志的位置；(b)确定航空测量辅助控制点的位置，判别... more |
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graphic scale | 图解比例尺
| See SCALE: BAR. | 参见bar scale(直线比例尺)。 |
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graticule | 经纬网，十字丝
| The network of lines representing MERIDIANS and PARALLELS on a MAP, CHART, or PLOTTING SHEET. See also GRID. A SCALE at the FOCAL PLANE of a... more | 地图、海图或者空白海图中表示经线和纬线的网线。亦可参见grid(经纬网)。位于光学仪器焦平面处辅助目... more |
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graticule adjustment | 格网调整
| The transportation or movement of the GRATICULE in order to change the ORIGIN of reference. | 为了改变参考原点而对格网的移动。 |
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gravel | 砾石
| Loose detrital material ranging in size from 2 to 256 mm. | 松散的碎屑岩石，直径在2-256毫米之间。 |
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gravimeter | 重力仪
| A weighing device or instrument of sufficient sensitivity to register variations in the WEIGHT of a constant mass when the mass is moved f... more | 一种高敏度的重力测量设备或者仪器。能够指示出地球上一定质量的物体从一地转移到另一地时，因重力... more |
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gravimetric survey | 重力测量
| See SURVEY. | 在地球表面不同地点确定重力加速度的测量。 |
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graving dock | 干船坞
| See DOCK: DRY. | 参见dry dock（干船坞）。 |
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gravitation | 引力，重力
| In general, the mutual attraction between masses of matter (bodies). Gravitation is the component of GRAVITY which acts towards the EARTH. | 从广义上讲，物体之间的相互吸引力。引力指指向地心的重力分量。 |
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gravity | 重力
| That force which tends to pull bodies towards the EARTH; that is to give bodies WEIGHT. Gravity is the resultant of two opposing forces: GRA... more | 把物体拉向地球的力；重力使物体产生重量。重力是引力和地球自转产生的离心力的合力。 |
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gravity: centre of | NULL | A point at which the mass of the entire body may be regarded as being concentrated. | NULL |
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gravity: direction of | NULL | The DIRECTION indicated by a PLUMB LINE. It is perpendicular to the surface of the GEOID. Also called direction of the force of gravity. | NULL |
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gravity: intensity of | NULL | The magnitude with which GRAVITY acts, expressed in suitable units, usually as an ACCELERATION, in GALS; as a force, in DYNES. | NULL |
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gravity anomaly | 重力异常
| The difference between the observed gravity value properly reduced to SEA LEVEL and the theoretical GRAVITY obtained from gravity formula. S... more | 某地实测重力值归算到海平面，与根据重力公式计算的理论值之间的差别。参见bouguer anomaly（布格异常）... more |
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gravity anomaly chart | 重力异常图
| See CHART. | 图形描绘的重力异常图。 |
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gravity coring | 重力岩芯取样
| A method to obtain cores by bottom penetration solely as a result of gravity. | 仅依靠重力作用穿透海底获取岩芯的方法。 |
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gravity meter | 重力仪
| See GRAVIMETER. | 参见gravimeter（重力仪）。 |