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	Term	术语	Definition	定义
	gale warning	大风警报	See WARNING.	指某地区出现或者将要出现蒲福风力8级或者9级风的气象警报信息。
	Galton's sun signal	伽尔顿回照器	See HELIOSTAT.	见heliostat（回照器）。
	galvanometer	电流计	An instrument for detecting and determining the intensity and direction of an electric current.	测量电流强度和方向的仪表。
	galvanoplasty (or galvanoplastics)	电镀	The process of coating things with metal by means of electrolysis.	用电解的方法在物体表面涂上一层金属物质的过程。
	gamma	反差系数，灰度系数；伽玛	Photographic term for negative contrast resulting from development, and not the contrast of the subject itself; a numerical measure of CONTR... more Photographic term for negative contrast resulting from development, and not the contrast of the subject itself; a numerical measure of CONTRAST in the development of a NEGATIVE. A small unit of MAGNETIC FIELD INTENSITY generally used in describing the EARTH's MAGNETIC FIELD. It is defined as being equal to 10-5 OERSTED.	照相术语。由显影引起的底片负反差，并不是被摄物体反差；负片显影反差的量度。一般用于描述地球磁场强度的单位。1伽玛=10-5奥斯特。
	gamma ray	伽玛射线	See X-RAYS.	参见X-RAYS （X射线）。
	gap	海山裂缝；航摄漏洞；山凹，隘口	A narrow break in a RIDGE or RISE.	海山的狭窄裂口。航摄像片上测量数据未能达到最小覆盖要求的部分。这可能是没有任何数据的空白部分，也有可能是未能达到最小重叠要求的部分。凹口，缺口。
	gas chromatography	气体色谱法	An analysis method used to determine dissolved oxygen and nitrogen content of SEA WATER.	测量海水中溶解的氧和氮含量的一种分析方法。
	gas field	气田	An area in which natural gas occurs in quantities worthy of exploitation.	从存储量上值得开发的天然气区域。
	gat	滩间水道，狭航道	A natural or artificial PASSAGE or CHANNEL through SHOALS or steep BANKS, or across a line of BANKS lying between two CHANNELS.	通过浅滩或者岸滩，或者横过两水道之间岸堤的自然或者人工水道。
	gate: hydraulic	液压闸门、液压封闭器	A form of valve used to regulate the FLOW of a liquid in a pipeline, RIVER or DAM.	用于控制管道、河流或者水坝水流的一种闸门结构。
	gauge	测量仪器	An instrument for measuring the size or state of anything.	测量物体大小或者状态的设备。
	gauge: depth	水深计，测深量尺	A general term for an instrument made to indicate DEPTH of water, especially one in which sea depths are indicated by pressure of water agai... more A general term for an instrument made to indicate DEPTH of water, especially one in which sea depths are indicated by pressure of water against a spring, or by degree of compression of air in a tube.	表示水深测量仪器的通用术语，特别是指采用水对弹簧压力或管内空气压缩程度测得水深的仪器。
	gauge: float	浮子验潮仪	A TIDE GAUGE that is operated by a float in a long, vertical stationary box to which the TIDE is admitted through an opening in the bottom.... more A TIDE GAUGE that is operated by a float in a long, vertical stationary box to which the TIDE is admitted through an opening in the bottom. Also called box gauge.	利用浮力原理工作的一种验潮仪。它是一个垂直固定的高盒子，底部有开口，海水从底部进入，由里面的浮子的升降指示潮高。也称为box gauge（箱形水位计）。
	gauge: pressure	压力计，验潮仪	An instrument for measuring pressure. A TIDE GAUGE operated by the change in pressure at the BOTTOM of a body of water, due to the RISE and... more An instrument for measuring pressure. A TIDE GAUGE operated by the change in pressure at the BOTTOM of a body of water, due to the RISE and fall of the TIDE.	测量压力的仪器。通过测定海水对验潮仪底部随涨落潮的压力变化，确定潮高的验潮仪。
	gauge: rain	雨量计	Instrument for measuring the depth of water from PRECIPITATION supposed distributed over a horizontal impervious surface and not subject t... more Instrument for measuring the depth of water from PRECIPITATION supposed distributed over a horizontal impervious surface and not subject to evaporation. Also written as one word.	假定雨降落到一个不渗透也不蒸发的水平面上，测量降雨水深以确定降雨量的仪器。亦可连写成一个单词。
	gauge: tide	验潮仪	A device for measuring the HEIGHT OF TIDE. A graduated staff in a sheltered area where visual observations can be made; or it may consist of... more A device for measuring the HEIGHT OF TIDE. A graduated staff in a sheltered area where visual observations can be made; or it may consist of an elaborate recording instrument making a continuous graphic record of tide height against time. Such an instrument is usually actuated by a float in a pipe communicating with the sea through a small hole which filters out shorter waves.	测量潮高的一种仪器。观测人员可在能看到量尺的掩体内观测；另外还可以在仪器上装有一种复杂的记录仪器进行连续的记录。这种仪器通常是通过一个管子内的浮子驱动，该管子通过一个小孔与海水相通，并通过该小孔滤掉一些小的波浪。
	gauss	高斯	The CGS unit of MAGNETIC INDUCTION.	在厘米•克•秒制中磁感应强度的单位。
	Gaussin error	高斯误差，磁罗经自差	See ERROR.	在感应力消失后的一个短暂时间内，船体结构内仍然存在的非永久磁性，磁罗经由于这种非永久性磁性引起的临时自差称之为高斯误差。这种自差一般在船舶以同一航向航行相当长一段时间后产生。
	gelbstoff	胶质物，有色可溶性有机物	Yellowish organic material suspended in sea water which causes greenish colour of the sea water in coastal areas; usually transported into t... more Yellowish organic material suspended in sea water which causes greenish colour of the sea water in coastal areas; usually transported into the sea by rivers.	一种悬浮在海水中的淡黄色有机物，这些物质使沿岸水域变绿；是通过河流运送到海水中的。
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