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港口疏浚工程
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港口疏浚工程
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港口疏浚工程
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dredging engineering of port
港口疏浚工程
为满足港池、航道、锚地等港口水域的水深要求,保证船舶安全航行、锚泊、停泊作业,用人力、水力或机械方法进行的水下土石方开挖工程。
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crop chemical control/regulation/manipulation
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crop damage in sunlight greenhouse due to continuous overcast days
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crop disease and pest disasters in China
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crop diseases in China
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