The Innovative Design of Deep In Situ Pressure Retained Coring Based on Magnetic Field Trigger Controller

<div>The valve seat is divided into identical shape tiles. (a) Two identical shape tile magnets. (b) Four identical shape tile magnets. (c) Eight identical shape tile magnets.</div>

Advances in Civil Engineering

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Figure 5

Figure 5: The Innovative Design of Deep In Situ Pressure Retained Coring Based on Magnetic Field Trigger Controller 