Niskin bottle. The bottle, more precisely a plastic cylinder, is lowered on a cable into the ocean, and when it has reached the required depth, a brass weight called a "messenger" is dropped down the cable. Each end is equipped with a cap which is either spring-loaded or tensioned by an elastic rope. The action of the messenger weight is to trip both caps shut and seal the tube trapping the water sample inside. Portugal
px | px | dpi | = | cm | x | cm | = | MB |
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Creative#:
TOP24710482
Source:
達志影像
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RM
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須由TPG 完整授權
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No
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No
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No
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Sale prohibited for poster and Fine art print worlwide
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