Abstract: The present disclosure discloses a method for extracting a duckweed turion starch, and belongs to the technical field of agriculture and food. The extraction method of the present disclosure includes the following steps: conducting drying and rehydration on a duckweed turion to obtain a rehydrated turion, soaking the rehydrated turion in a solvent, and then conducting washing and filtration to obtain a decolorized duckweed turion; or conducting beating on a fresh duckweed turion, soaking the fresh duckweed turion in a solvent, and then conducting washing and filtration to obtain a decolorized duckweed turion slurry; and putting the decolorized duckweed turion or the decolorized duckweed turion slurry in a dispersion liquid for extraction at a rotation speed of 6,000-18,000 rpm at 25-50° C. for 5-60 min, and then conducting filtration, centrifugation, washing and drying to obtain the duckweed turion starch.

Abstract: A measuring system includes a smart terminal and a measuring device. The smart terminal includes a first power source module, a first processor, a first wireless communication unit and a memory. The measuring device includes a measuring module, a second power source module and a second wireless communication unit. The measuring system may include one or more applications to provide a rich set of functionalities.

Abstract: A measuring system includes a smart terminal and a measuring device. The smart terminal includes a first power source module, a first processor, a first wireless communication unit and a memory. The measuring device includes a measuring module, a second power source module and a second wireless communication unit. The measuring system may include one or more applications to provide a rich set of functionalities.

Abstract: A measuring system includes a smart terminal and a measuring device. The smart terminal includes a first power source module, a first processor, a first wireless communication unit and a memory. The measuring device includes a measuring module, a second power source module and a second wireless communication unit. The measuring system may include one or more applications to provide a rich set of functionalities.

Abstract: A torsion-adjustable impact wrench, includes a housing, a powering unit including an impact mechanism configured to generate an intermittently increasing torque, an adjusting unit configured to manually set a first torsion value and generate a corresponding a first torsion signal, a detecting unit configured to detect a rotational speed of the powering unit and generate a corresponding first rotational speed signal, and a control unit configured to generate a control signal for controlling the output of the rotational speed of the powering unit. The control unit generates a second rotational speed signal according to the first torsion signal outputted by the adjusting unit, compares the first rotational speed signal with the second rotational speed signal, and generates a control signal enabling the rotational speed of the powering unit to approach the second rotational speed.

Abstract: An electrical wrench includes a housing, a power member, a reversing mechanism, a support transmission assembly, an opening gear, a main control assembly and a restoring assembly. The housing includes having two projections, for example shaped as claws, arranged oppositely to cooperatively define an entrance. The power member, the reversing mechanism, the support transmission assembly and the opening gear are cooperatively coupled to one another and accommodated in the housing. The opening gear includes an outer teeth portion, an opening and a driving portion in communication with the opening, a tubular member for engaging with a fastener positioned in cooperation with the opening gear through the entrance. The restoring assembly includes an identifying portion, a sensor for sensing the position of the identifying portion, a control circuit board, a restoring switch and a restoring switch operator.

Abstract: An electrical wrench includes a motor, a transmission mechanism, a ratchet assembly and a controlling member coupled to each other. The transmission mechanism is configured to provide idle travels. The ratchet assembly receives the rotating torque output by the transmission mechanism and drives the ratchet therein in a single direction. The controlling member is connected with the motor and controls the motor to rotate in the opposite direction when detecting the motor is stalled. The electrical wrench thus provides impacting action by electrical control and simplifies the mechanical structure of the tool, which not only reduces the manufacturing cost, but also prolongs the working life of the tool.

Abstract: An intelligent charging system includes a charging device, a battery pack, an electric tool powered by the battery pack, and a terminal device capable of communicating with the charging device and having a network communication function on its own. The charging system provides effective information chains between the integral parts, achieves remote operation or setting, improves utilization rate of the charging system, and facilitates the user to use an apparatus obtaining electrical energy from the charging system in a planned manner. The charging assembly helps the user to use the terminal device to control the charging procedure.

Abstract: A measuring system includes a smart terminal and a measuring device. The smart terminal includes a first power source module, a first processor, a first wireless communication unit and a memory. The measuring device includes a measuring module, a second power source module and a second wireless communication unit. The measuring system may include one or more applications to provide a rich set of functionalities.

Abstract: An electrical wrench includes a housing, a power member, a reversing mechanism, a support transmission assembly, an opening gear, a main control assembly and a restoring assembly. The housing includes having two projections, for example shaped as claws, arranged oppositely to cooperatively define an entrance. The power member, the reversing mechanism, the support transmission assembly and the opening gear are cooperatively coupled to one another and accommodated in the housing. The opening gear includes an outer teeth portion, an opening and a driving portion in communication with the opening, a tubular member for engaging with a fastener positioned in cooperation with the opening gear through the entrance. The restoring assembly includes an identifying portion, a sensor for sensing the position of the identifying portion, a control circuit board, a restoring switch and a restoring switch operator.

Abstract: An electrical wrench includes a motor, a transmission mechanism, a ratchet assembly and a controlling member coupled to each other. The transmission mechanism is configured to provide idle travels. The ratchet assembly receives the rotating torque output by the transmission mechanism and drives the ratchet therein in a single direction. The controlling member is connected with the motor and controls the motor to rotate in the opposite direction when detecting the motor is stalled. The electrical wrench thus provides impacting action by electrical control and simplifies the mechanical structure of the tool, which not only reduces the manufacturing cost, but also prolongs the working life of the tool.

Abstract: A torsion-adjustable impact wrench, includes a housing, a powering unit including an impact mechanism configured to generate an intermittently increasing torque, an adjusting unit configured to manually set a first torsion value and generate a corresponding a first torsion signal, a detecting unit configured to detect a rotational speed of the powering unit and generate a corresponding first rotational speed signal, and a control unit configured to generate a control signal for controlling the output of the rotational speed of the powering unit. The control unit generates a second rotational speed signal according to the first torsion signal outputted by the adjusting unit, compares the first rotational speed signal with the second rotational speed signal, and generates a control signal enabling the rotational speed of the powering unit to approach the second rotational speed.