electrical device or electronic programmable switching for the technique of electric installation, in particular for the

摘要

a section of the rod ends of telescopic attestature includes a section of auxiliary barrel mounted in it to be extensible to the back.and a section of barrel mounted in front section of pipe to be extended forward in the auxiliary section of one end of attestatura.when the section of the auxiliary pole is in a position.one end of the rear section of the grip rod auxiliary lies adjacent to a rear end of the section of the end of attestatura.