heading index 中文意思是什麼
heading index
解釋
航向指標-
The dial index will rotate in azimuth, giving an incorrect heading reading.
讀數示標會繞方位軸轉動，給出不正確的航向讀數。 -
Radar echoes include echoes of lands, islands, all kinds of moving targets, racon, sart and sea, etc. arpa marks consist of fixed range marker, variable range marker, electronic bearing line, guard zone, heading - line, parallel index ( 4 navigation lines ), vector lines ( or pad ) and past track information of tracked target ships, marks of trial manoeuvres, ect
雷達回波包括陸地、島嶼回波，各種活動目標的回波，雷康、 sart回波，海雜波等。 arpa符號包括包括固定距標圈、活動距標圈、電子方位線、警戒圈、船首線、 pi線、已錄取目標的矢量線以及歷史航跡（或pad ） 、試操船符號等。 -
Based on rheologic and mutative mechanism of coal and gas outburst, this article discusses the forecast of outburst danger of in 7 ( superscript # ) coal heading face of jinjia mine by adopting coal and gas outburst volume dynamic index after blowing out. it determines the index critical value, and also presents the tentative testing result
摘要基於煤與瓦斯突出流變突變機理，探討了金佳礦7 （上標# ）煤層掘進工作面採用放炮后落煤瓦斯湧出量動態指標預測突出危險性，確定了指標臨界值，並介紹了初步試驗效果。 -
In library science, a subject heading or descriptor in an index
在圖書館學中，索引中的主題標題或關鍵詞。
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