... 自然对僚热器 natural convector 天然深度 natural depth 自然通风凉水塔 natural draft cooling tower ...
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... 自然损耗：exhaust of nature 自然水深：Natural Depth 自然缺陷：natural defect ...
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Yet reaching this point has required significant deepening of the Savannah River, from its natural depth of 17 feet (5.2 metres) to 42 feet today.
ECONOMIST: Savannah's port
In 2008, Switzerland-based Manas Petroleum (MNAP) announced it found an estimated 3 billion barrels of oil and 3 trillion cubic feet of natural gas at depth.
FORBES: After The Gulf: Is Albania The Next Oil Frontier?
Natural search is highly affected by the depth of content.
FORBES: Michael Dell's Dorm Room Start-Up Summit
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