. Deep ocean cable burial concept development. Cables, Submarine; Marine engineering; Civil engineering. /?^3^ (a) Upmilling. (b) Climbmilling. A. Chain Bucket Trencher.. (a) Upmilling. (b) Climbmilling. B. Wheel Trencher. Figure 4. Trenching modes. 19. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Rockwell, P. K; Naval Construction Battalion Center (Port Hueneme, Calif. ). Civil Engineering Laboratory. Port Hueneme, Cali
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