The present invention provides a method for extraction of metals selected from Cr, Mo, Pd, Tc, W, Re, and Pu using a new extractant of methyliminobisalkylacetamide represented by a formula :CH3\u2014N\u20142 \u2003\u2003wherein R represents an alkyl group having 8-12 carbon atoms. One of the spaces in each pair is used for a directory for locating data in the logical volume. Boot-supporting services, OS kernel mirrors, and applications are preset on the server; After being powered, the client broadcasts the boot request to the network and the server allocates network parameters for it. The cephalo-cervical restraint improves the efficacy of all PFD designs elements targeting turning.