| http://www.w3.org/ns/prov#value | - For thepurpose of preventing the anchor unit 7 from opening more widely than required, the moving range of the link arms 15 and 16 is controlled, and opening operation is stopped before the subsoil is destroyed.After the mechanical anchor 1 has been used for the purpose such as the loading test, the hydraulic pressure in the hydraulic cylinder 8 is withdrawn, and the cylinder rod 10 is brought int
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