dredged bottom 中文意思是什麼
dredged bottom
解釋
挖成的水底-
The little marine animal neopilina, which was dredged up from the bottom of the pacific in 1952, looks practically identical to its ancestors presented as fossils over 50 million years ago.
1952年在太平洋底挖出來的小形海洋動物，新帽貝，看上去簡直同保存了五億多年的化石祖先一樣。 -
12 all barges and hoppers, if utilized for marine transportation of dredged materials, shall have tight fitting seals to their bottom openings to prevent leakage of material
所有用作海上運送挖掘物料的駁船及底卸式駁船，應在底部開口處設置牢固的密封裝置，以防漏出物料。 -
Use of drained method for reclamation for all phases instead of dredged method - drained reclamation takes longer but does not require dredging of contaminated bottom sediments
建築期間所有填土工程應避免使用挖掘方法而改用排放方法填土，雖然需時較長，但不需挖掘備受污染的海床沉積物
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