. Deep ocean cable burial concept development. Cables, Submarine; Marine engineering; Civil engineering. Input. Table 3. Power Conversion Efficiencies 0.39 Cavitation Cutting and Eigh-Pvessicpe Jetting. Both of these techniques use the principle of focusing moderate amounts of energy to achieve ultra- high energy densities to cut, fracture, or erode materials such as rock and metal. As such, they are not suitable means of excavating a trench in soft materials. High-energy density water jets achieve 100,000 to 5,000,000 psi in a jet 1/16 inch in diameter. The optimal cutting range is 20 nozzle
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