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Austal USA lays keel of its first OPC: Pickering (WMSM 919)
Austal USA yesterday hosted a keel laying ceremony for Pickering (WMSM 919), the first U.S. Coast Guard (USCG) Heritage-class ...
Human and physical features are things that you can see all around you. Physical features like seas, mountains and rivers are natural. They would be here even if there were no people around. Human ...
Abstract: In order to visually display the construction process of the climbing frame of the building construction protection platform and enrich the content of the construction climbing frame part ...
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