单词 | pan |
释义 | pan [pan] COMMUNICATIONS To tilt or otherwise move a television or movie camera vertically and horizontally to keep it trained on a moving object or to secure a panoramic effect. GEOLOGY 1. A shallow, natural depression or basin containing a body of standing water. 2. A hard, cementlike layer, crust, or horizon of soil within or just beneath the surface; may be compacted, indurated, or very high in clay content. MINING ENGINEERING 1. A shallow, circular, concave steel or porcelain dish in which drillers or samplers wash the drill sludge to gravity-separate the particles of heavy, dense minerals from the lighter rock powder as a quick visual means of ascertaining if the rocks traversed by the borehole contain minerals of value. 2. The act or process of performing the above operation. OCEANOGRAPHY See <<pancake ice>> |
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