Abstract: A storable and labor-saving screwdriver and screwdriver heads thereof are provided, relating to the field of screwdriver technology, which includes a grip handle in a cylinder shape and a handle head labor-saving assembly, wherein a rear end of the grip handle is provided with the handle head labor-saving assembly, the handle head labor-saving assembly is retractable, a plurality of inner hexagonal storage chambers are uniformly distributed on the grip handle along a longitudinal direction. The screwdriver can be used to tighten and replace screws of different specifications and models. It has advantages in simple operation, compact structure, and smaller volume, which is easy to carry, and easier for a screwdriver to tighten screws and save labor.

Abstract: A storable and labor-saving screwdriver and screwdriver heads thereof are provided, relating to the field of screwdriver technology, which includes a grip handle in a cylinder shape and a handle head labor-saving assembly, wherein a rear end of the grip handle is provided with the handle head labor-saving assembly, the handle head labor-saving assembly is retractable, a plurality of inner hexagonal storage chambers are uniformly distributed on the grip handle along a longitudinal direction. The screwdriver can be used to tighten and replace screws of different specifications and models. It has advantages in simple operation, compact structure, and smaller volume, which is easy to carry, and easier for a screwdriver to tighten screws and save labor.

Abstract: A data transmission method and apparatus are disclosed. A 3G AE and a 3G RE are deployed between a sender device and a receiver device, M channels are established between the 3G AE and the 3G RE, and M is larger than or equal to 2. The method includes that, the 3G AE encapsulates data sent by the sender device into N PDUs, and transmits the N PDUs to the 3G RE through the M channels between the 3G AE and the 3G RE; and the 3G RE restores the received PDUs to the data sent by the sender device, and sends the data to the receiver device; where N is larger than or equal to 2, and equal to or different from M.

Abstract: A data transmission method and apparatus are disclosed. A 3G AE and a 3G RE are deployed between a sender device and a receiver device, M channels are established between the 3G AE and the 3G RE, and M is larger than or equal to 2. The method includes that, the 3G AE encapsulates data sent by the sender device into N PDUs, and transmits the N PDUs to the 3G RE through the M channels between the 3G AE and the 3G RE; and the 3G RE restores the received PDUs to the data sent by the sender device, and sends the data to the receiver device; where N is larger than or equal to 2, and equal to or different from M.