Abstract: A refrigerator includes a refrigerator body and a door body. In a case where the door body is opened from a closed state to a first state, a first hinge shaft moves from a first positioning position to a second positioning position along a first positioning trajectory line with respect to a first trajectory slot, and a second hinge shaft moves from a first guiding position to a second guiding position along a first guiding trajectory line with respect to a second trajectory slot. In a case where the door body continues to be opened from the first state to a second state, the first hinge shaft moves from the second positioning position to a third positioning position along a second positioning trajectory line, the second hinge shaft moves from the second guiding position to a third guiding position along a second guiding trajectory line.

Abstract: This application provides data transmission methods, devices, and systems. In one implementation, a method comprises: receiving, by a central device of a wireless network, at least one first data packet sent by a remote device of the wireless network, wherein each of the at least one first data packet comprises a sequence number indicating a relative location of a payload of the corresponding first data packet in a second data packet; reordering, by the central device, the at least one first data packet, based on the sequence number of each of the at least one first data packet, to obtain the second data packet; and sending, by the central device, the second data packet.

Abstract: A new hammering system with electromagnetic power for dynamic pile testing. The basic working principle of the hammering system is as follows: when an internal coil is energized, a magnetic force is generated to attract tightly, via a magnetic conduction panel, an adaptive weight hammer disposed in contact with the surface of the panel; when the internal coil is de-energized, demagnetization occurs, and the weight hammer falls instantaneously to impact the pile top, thereby achieving the effects of a stable weight hammer and quick attraction and falling of the hammer. A clamping scale is arranged inside an adjustment section of a guide frame. A falling height of the weight hammer may be selected arbitrarily.

Abstract: A new hammering system with electromagnetic power for dynamic pile testing. The basic working principle of the hammering system is as follows: when an internal coil is energized, a magnetic force is generated to attract tightly, via a magnetic conduction panel, an adaptive weight hammer disposed in contact with the surface of the panel; when the internal coil is de-energized, demagnetization occurs, and the weight hammer falls instantaneously to impact the pile top, thereby achieving the effects of a stable weight hammer and quick attraction and falling of the hammer. A clamping scale is arranged inside an adjustment section of a guide frame. A falling height of the weight hammer may be selected arbitrarily.