Abstract: A fracturing device, including a power unit, wherein the power unit comprises a muffling compartment, a turbine engine, an air intake unit, and a starter; the air intake unit is communicated with the turbine engine through an intake pipe, and configured to provide a combustion-supporting gas to the turbine engine; the air intake unit is located at the top of the muffling compartment, the muffling compartment comprises an accommodation space, the turbine engine and the starter are located in the accommodation space, and the starter is configured to start the turbine engine, the starter comprises a first electric motor.

Abstract: A plunger pump base and a plunger pump device. The plunger pump base includes a support assembly and an extension assembly. The support assembly includes a top plate, a bottom plate and a support frame, the top plate and the bottom plate are oppositely arranged at an interval, and the support frame is respectively fixed with the top plate and the bottom plate. The extension assembly includes an extension block, a first telescopic mechanism and a second telescopic mechanism. One end of the first telescopic mechanism is rotatably connected to the extension block, the other end of the first telescopic mechanism is rotatably connected to the top plate. One end of the second telescopic mechanism is rotatably connected to the extension block, and the other end of the second telescopic mechanism is rotatably connected to the bottom plate.

Abstract: An electrical connector includes an insulating body, a first installation module and a second installation module. The first installation module includes a first internal circuit board and a first terminal adapter block. The second installation module includes a second internal circuit board and a second terminal adapter block. The first internal circuit board and the first terminal adapter block include first fool-proof portions that cooperate with each other. The second internal circuit board and the second terminal adapter block include second fool-proof portions that cooperate with each other. The first fool-proof portions are different from the second fool-proof portions, thereby preventing the first terminal adapter block from being incorrectly connected to the second internal circuit board, and preventing the second terminal adapter block from being incorrectly connected to the first internal circuit board.

Abstract: A modular connector includes a housing, a circuit board located in the housing, a connector assembly connected to the circuit board, and a coil module mounted to the circuit board. The connector assembly includes a number of conductive terminals. The coil module includes a first coil module and a second coil module. The first coil module includes a number of first coils and a number of first coil groups. The second coil module includes a second coil. The second coil is divided into a number of second coil groups along its circumference. The first coil groups and corresponding second coil groups are coupled, thereby improving the electromagnetic shielding effect of the modular connector.

Abstract: A three-electrode array local electrochemical information testing system and a testing method, the testing system comprising: a concentric ring three-electrode array, a high-speed switch and an electrochemical workstation, which are electrically connected in sequence; the concentric ring three-electrode array comprises a plurality of concentric ring three-electrode units, adjacent concentric ring three-electrode units being separated by an insulating material; a concentric ring three-electrode unit comprises a ring-shaped auxiliary electrode, a solid-state reference electrode and a wire-shaped working electrode; the ring-shaped auxiliary electrode and the solid-state reference electrode are both formed in an ring-shaped shape; the wire-shaped working electrode is located within the solid-state reference electrode, the wire-shaped working electrode being separated from the solid-state reference electrode by means of the insulating material; the solid-state reference electrode is located within the ring-shaped

Abstract: An electrical connector includes an insulating body, a first installation module and a second installation module. The first installation module includes a first internal circuit board and a first terminal adapter block. The second installation module includes a second internal circuit board and a second terminal adapter block. The first internal circuit board and the first terminal adapter block include first fool-proof portions that cooperate with each other. The second internal circuit board and the second terminal adapter block include second fool-proof portions that cooperate with each other. The first fool-proof portions are different from the second fool-proof portions, thereby preventing the first terminal adapter block from being incorrectly connected to the second internal circuit board, and preventing the second terminal adapter block from being incorrectly connected to the first internal circuit board.

Abstract: A modular connector includes a housing, a circuit board located in the housing, a connector assembly connected to the circuit board, and a coil module mounted to the circuit board. The connector assembly includes a number of conductive terminals. The coil module includes a first coil module and a second coil module. The first coil module includes a number of first coils and a number of first coil groups. The second coil module includes a second coil. The second coil is divided into a number of second coil groups along its circumference. The first coil groups and corresponding second coil groups are coupled, thereby improving the electromagnetic shielding effect of the modular connector.

Abstract: A three-electrode array local electrochemical information testing system and a testing method, the testing system comprising: a concentric ring three-electrode array, a high-speed switch and an electrochemical workstation, which are electrically connected in sequence; the concentric ring three-electrode array comprises a plurality of concentric ring three-electrode units, adjacent concentric ring three-electrode units being separated by an insulating material; a concentric ring three-electrode unit comprises a ring-shaped auxiliary electrode, a solid-state reference electrode and a wire-shaped working electrode; the ring-shaped auxiliary electrode and the solid-state reference electrode are both formed in an ring-shaped shape; the wire-shaped working electrode is located within the solid-state reference electrode, the wire-shaped working electrode being separated from the solid-state reference electrode by means of the insulating material; the solid-state reference electrode is located within the ring-shaped