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鸣笛标
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鸣笛标
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水运交通指示
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whistle board
鸣笛标
设在通航控制河段或上、下行船舶不能相互通视的急转弯的上下游两端河岸上,指示船舶鸣笛的水上助航标志。
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water price for end canal system
water price for key project
water price of special industry
water price of urban and rural water supply
water pricing mode
water product function of grassland
water project deformation monitoring
water project environmental impact assessment
water project of Baojiatun village
water project operation for emergency water pollution accident
water project safety monitoring
water project seepage monitoring
water project visual inspection
water proof and moisture permeable finishing
waterproof board
waterproof coatings
waterproof coiled material
waterproof conerete
waterproof door chamber
waterproofing membrane
water proofing polymer
waterproof layer
waterproof leather
waterproof material
waterproof mortar
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