Abstract: A parallel burning system and method are disclosed. The system includes a master host computer, a plurality of slave host computers, and a plurality of burning modules; the master host computer is connected to the plurality of slave host computers. The plurality of slave host computers are connected one to one with the plurality of burning modules, constituting a plurality of burning channels. The plurality of burning modules are connected to a plurality of products to be burned by using different communication modes. The master host computer is used to call the plurality of slave host computers, transmit multiple pieces of burning data corresponding to the plurality of products to be burned to the plurality of burning modules via the plurality of burning channels, and burn the multiple pieces of burning data in parallel by means of the plurality of burning modules to the plurality of products to be burned.

Abstract: The present application discloses a password protection method.

Abstract: The present application discloses a password protection method.

Abstract: A rotation guidance apparatus belonging to the technical field of oil drilling equipment. An end part of a lower connector has a ball-socketed ball-joint rod, and a drill bit is connected to the ball-socketed ball-joint rod. Several circumferentially and evenly distributed piston holes are provided in a side wall of the lower connector, wherein a piston matches each piston hole and a piston rod connected to the piston is movably connected to the ball-socketed ball-joint rod. An eccentrically-placed valve core is connected to a controller provided in an upper connector, wherein a working face of the eccentrically-placed valve core is opposite to the piston holes and rotation of the eccentrically-placed valve core makes the pistons in the piston holes move to control the rotation guidance of the ball-socketed ball-joint rod.

Abstract: Disclosed is a rotation guidance apparatus belonging to the technical field of oil drilling equipment. An end part of a lower connector (3) has a ball-socketed ball-joint rod (12), and a drill bit (1) is connected to the ball-socketed ball-joint rod (12); several circumferentially and evenly distributed piston holes are provided in a side wall of the lower connector (3), a piston matches each piston hole, and a piston rod (11) connected to the piston is movably connected to the ball-socketed ball-joint rod (12); and a eccentrically-placed valve core (17) is connected to a controller provided in an upper connector (4), a working face of the eccentrically-placed valve core (17) is opposite to the piston holes, and rotation of the eccentrically-placed valve core (17) makes the pistons in the piston holes move to control the rotation guidance of the ball-socketed ball-joint rod (12).