Abstract: A fracturing apparatus is provided. The fracturing apparatus includes a plunger pump, a transmission shaft, a main motor, an oil pipe, a first radiator and a noise reduction cabin. The main motor is spaced apart from the plunger pump, the plunger pump is connected with the main motor through the transmission shaft; the oil pipe is configured to be connected with the plunger pump; the first radiator is spaced apart from the plunger pump, the first radiator is configured to dissipate heat from oil in the oil pipe, the main motor, the first radiator and at least part of the oil pipe are all located inside the noise reduction cabin, and the plunger pump is located outside the noise reduction cabin.

Abstract: An iron-based metal powder for ultra-high-speed laser cladding comprising chemical composition and mass percentage of the metal powder of: C 0.6˜1.0%, Cr 17.0˜20.0%, Ni 5.0˜6.5%, Mn 2.0˜4.0%, Mo 1.0˜1.5%, Ti 4.0˜6.0%, B 1.0˜1.5%, N 0.08˜0.15%, Si?0.5%, P?0.030%, S?0.030%, balance of Fe and unavoidable impurities, wherein the particle size of the metal powder is 15˜65 ?m, the fluidity is 16˜20 s/50 g.

Abstract: A data transmission control device is provided. The data transmission control device is disposed in a chip that includes a Peripheral Component Interconnect Express (PCIe) interface, and the data transmission control device is coupled to a memory that includes a block. The data transmission control device includes: a control circuit, a PCIe interface controller, and an address monitoring circuit. The PCIe interface controller is configured to receive a data. The address monitoring circuit is configured to issue an interrupt to the control circuit when the data is written to the block.

Abstract: A tethering device includes a primary housing supporting a retraction mechanism; a secondary housing configured to be connected to a tethered object; a retractable tether extending from the retraction mechanism to the secondary housing to movably couple the secondary housing to the primary housing; a first magnet assembly supported by the primary housing; and a second magnet assembly supported by the secondary housing, wherein the second magnet assembly is configured to engage with the first magnet assembly to bias the secondary housing towards the primary housing.

Abstract: The present invention discloses a chromatographic analysis device based on a multifunctional integrated probe, and a use method of the chromatographic analysis device. The chromatographic analysis device integrates chromatographic sampling, sample injection and separation functions into the integrated probe. Meanwhile, the present invention further discloses a method for performing microsample analysis by the chromatographic analysis device based on the multifunctional integrated probe. The present invention has the main advantages as follows: the device is high in integration level, small in dead volume, simple in structure, convenient to use and particularly suitable for microsample analysis with a small sample amount, provides a new chromatographic sample injection mode for chromatographic analysis, and provides an ideal platform for chromatographic analysis and on-site chromatographic analysis of a trace amount of samples.

Abstract: A tethering device includes a primary housing supporting a retraction mechanism; a secondary housing configured to be connected to a tethered object; a retractable tether extending from the retraction mechanism to the secondary housing to movably couple the secondary housing to the primary housing; a first magnet assembly supported by the primary housing; and a second magnet assembly supported by the secondary housing, wherein the second magnet assembly is configured to engage with the first magnet assembly to bias the secondary housing towards the primary housing.

Abstract: The present invention provides an airflow test method comprising: setting a plurality of test points within a test space; detecting the respective one-dimensional velocities of the airflow at each test point along a plurality of test directions, said plurality of test directions including at least three directions; calculating the actual direction and the actual velocity of the airflow at each test point based on the respective one-dimensional velocities of the airflow at the test point along the plurality of test directions. Also, the present invention provides an airflow test apparatus and a clean room control system. The present invention enables detecting the distribution of airflow in the test space with simple method.

Abstract: The present invention provides an airflow test method comprising: setting a plurality of test points within a test space; detecting the respective one-dimensional velocities of the airflow at each test point along a plurality of test directions, said plurality of test directions including at least three directions; calculating the actual direction and the actual velocity of the airflow at each test point based on the respective one-dimensional velocities of the airflow at the test point along the plurality of test directions. Also, the present invention provides an airflow test apparatus and a clean room control system. The present invention enables detecting the distribution of airflow in the test space with simple method.