Abstract: A drilling device includes a hydraulic drilling unit, a multi-way connector, a compressed air conduit, a plurality of air compressor units, an air duct, a dust removal unit and an operation bench. The hydraulic drilling unit is capable of moving among a plurality of drilling platforms and among a plurality of hole positions on the plurality of drilling platforms and performing a drilling operation. The plurality of air compressor units are disposed in a fixing and mounting region that is between the plurality of drilling platforms. The dust removal unit includes a dust collection cover and a dust remover, where the dust collection cover is configured to be located at any one of the plurality of hole positions, the dust remover is disposed in the fixing and mounting region, and the dust collection cover and the dust remover are connected through the air duct.

Abstract: A cylinder assembly of a single crystal pulling apparatus and a single crystal pulling apparatus are provided in the present disclosure. The cylinder assembly includes an inner cylinder, an outer cylinder, an annular plate and a sleeve. The inner cylinder has a shape of inverted conical. An upper end of the inner cylinder is connected to an upper end of the outer cylinder. A lower end of the outer cylinder is hermetically connected to an outer edge of the annular plate. A lower end of the inner cylinder is fixedly connected to an upper surface of the annular plate. The sleeve passes through and is fixed in an annular opening of the annular plate.

Abstract: A heater that may be included in a single crystal growing apparatus includes a heating body. The heating body has a bowl shape and has a bottom having an opening. The heating body is divided into a first heating zone and a second heating zone in the circumferential direction. The first heating zone includes a first main heating area and the second heating zone includes a second main heating area. The first main heating area and the second main heating area are located at different position with different heights in the axial direction of the heating body.

Abstract: A field agricultural machinery test platform, comprising a field soil groove, traveling guide rails, traveling trolleys, a hitch trolley, a hitch device mechanism, and a test system. The two guide rails are provided on both sides of the field soil groove in parallel, and the traveling trolleys are located on the guide rails; a cross beam is provided between the two guide rails, and the two ends of the cross beam are respectively connected to the traveling trolleys; the hitch trolley is provided on the cross beam, and a hitch device is provided on the hitch trolley; the test system is provided on the hitch trolley and the hitch device; a test machine is connected to the hitch device; the test system comprises an image assembly, a force test assembly, and a control assembly which are mounted on the hitch trolley.

Abstract: An assembly sleeve of a single crystal pulling apparatus, and the single crystal pulling apparatus are provided. The assembly sleeve includes inner and outer cylinders and a bottom cylinder. The outer cylinder is provided with openings at both ends and sleeved onto the inner cylinder. The bottom cylinder is arranged at the opening at a lower end of the outer cylinder, and includes an annular plate and a lower cylinder. Each of the inner lower cylinders is of an inverted-cone shape, an upper end of the inner cylinder is connected to an upper end of the outer cylinder, an outer edge of the annular plate is hermetically connected to the lower end of the outer cylinder, an inner edge of the annular plate is connected to an upper end of the lower cylinder, and a lower end of the inner cylinder is fixedly connected to an upper surface of the annular plate.

Abstract: A display screen and a method for display control are provided in the disclosure. The display screen includes an emissive display assembly, a reflective liquid crystal display assembly, and a controller. The controller is configured to acquire a brightness value of current ambient light, and according to a variation in the brightness value of the ambient light, control the emissive display assembly to work to emit light for display, and/or control the reflective liquid crystal display assembly to work to use the ambient light for display.

Abstract: The present disclosure discloses a heater in a Hot-Zone of a single crystal pulling apparatus and a single crystal pulling apparatus. The heater in the Hot-Zone of the single crystal pulling apparatus includes a side-main heater and an auxiliary heater. Each of the side-main heater and the auxiliary heater is a cylindrical structure with openings at two ends thereof. Each of the side-main heater and the auxiliary heater includes a top open end and a bottom open end. The auxiliary heater is sleeved around the side-main heater, and the top open end of the auxiliary heater extends out of the top open end of the side-main heater.

Abstract: A cylinder assembly of a single crystal pulling apparatus and a single crystal pulling apparatus are provided in the present disclosure. The cylinder assembly includes an inner cylinder, an outer cylinder, an annular plate and a sleeve. The inner cylinder has a shape of inverted conical. An upper end of the inner cylinder is connected to an upper end of the outer cylinder. A lower end of the outer cylinder is hermetically connected to an outer edge of the annular plate. A lower end of the inner cylinder is fixedly connected to an upper surface of the annular plate. The sleeve passes through and is fixed in an annular opening of the annular plate.

Abstract: A field agricultural machinery test platform, comprising a field soil groove, traveling guide rails, traveling trolleys, a hitch trolley, a hitch device mechanism, and a test system. The two guide rails are provided on both sides of the field soil groove in parallel, and the traveling trolleys are located on the guide rails; a cross beam is provided between the two guide rails, and the two ends of the cross beam are respectively connected to the traveling trolleys; the hitch trolley is provided on the cross beam, and a hitch device is provided on the hitch trolley; the test system is provided on the hitch trolley and the hitch device; a test machine is connected to the hitch device; the test system comprises an image assembly, a force test assembly, and a control assembly which are mounted on the hitch trolley.

Abstract: An assembly sleeve of a single crystal pulling apparatus, and the single crystal pulling apparatus are provided. The assembly sleeve includes inner and outer cylinders and a bottom cylinder. The outer cylinder is provided with openings at both ends and sleeved onto the inner cylinder. The bottom cylinder is arranged at the opening at a lower end of the outer cylinder, and includes an annular plate and a lower cylinder. Each of the inner lower cylinders is of an inverted-cone shape, an upper end of the inner cylinder is connected to an upper end of the outer cylinder, an outer edge of the annular plate is hermetically connected to the lower end of the outer cylinder, an inner edge of the annular plate is connected to an upper end of the lower cylinder, and a lower end of the inner cylinder is fixedly connected to an upper surface of the annular plate.