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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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