Abstract: The present disclosure provides a pixel arrangement structure, a metal mask, a display panel and a display device, and the pixel arrangement structure includes a first sub-pixel located at a first vertex of a first virtual polygon; a second sub-pixel located at a second vertex of the first virtual polygon, the first vertex and the second vertex being arranged alternately and spaced apart; and a third sub-pixel located inside the first virtual polygon, wherein two first sub-pixels are arranged at each first vertex, and a line connecting centers of third sub-pixels in two adjacent first virtual polygons is parallel to a row direction or a column direction. The present disclosure not only solves the jagged display problem of the OLED display device, but also is beneficial to improving the pixel density of the OLED display device.

Abstract: Provided are a pixel arrangement structure, a metal mask, a display panel and a display apparatus, the structure includes: a plurality of first and second pixel units, the first pixel unit includes one first sub-pixel, one second sub-pixel and one third sub-pixel; the second pixel unit includes one first sub-pixel, one second sub-pixel and two third sub-pixels; an aperture area of the third sub-pixel in the first pixel unit is greater than that of each third sub-pixel in the second pixel unit, a first spacing exists between two third sub-pixels in the second pixel unit, a second spacing exists between the first and second sub-pixels in the second pixel unit, the first spacing is greater than the second spacing; the third sub-pixel located in the first pixel unit and two adjacent third sub-pixels belonging to different second pixel units correspond to a same aperture region of a metal mask.

Abstract: Provided in the present application are a pixel arrangement structure, a metal mask and an organic light-emitting display apparatus. The pixel arrangement structure comprises a plurality of pixel units, which are arranged in an array in order, wherein each pixel unit comprises a first sub-pixel, a second sub-pixel, and two third sub-pixels having the same area, the two third sub-pixels having the same area are arranged in the same row, the first sub-pixel and the second sub-pixel are arranged in another row that is adjacent thereto, and the third sub-pixels having the same area and at least one third sub-pixel that is adjacent thereto correspond to the same opening region of the metal mask.

Abstract: An exhaust gas mixer arrangement for mixing exhaust gases of an internal combustion engine with an additive comprises an exhaust gas flow duct (28) with an inlet area (24) arranged upstream and with a discharge area (26) arranged downstream. The exhaust gas flow duct (28) is bent in a coil-like manner at least in some areas between the inlet area (24) and the discharge area (26).

Abstract: Disclosed is a method for producing three-line hybrid wheat parent foundation seeds, including: determining whether sterile-line head progeny rows satisfy 100% sterile degree index of a sterile line or not by bagged selfing of the sterile-line head progeny rows, separately harvesting the bagged outcrossed heads satisfying the index to achieve cyclic breeding of sterile-line spike lines, and mixedly harvesting the sterile-line head progeny rows satisfying the index for sterile-line foundation seed plots; conducting test crossing on the separately harvested bagged outcrossed head seeds and the restorer-line head progeny rows, correspondingly numbering the restorer-line head progeny rows and bagged test-crossed heads, and separately harvesting bagged test-crossed seeds; conducting yield comparison on the separately harvested bagged test-crossed seeds, taking a part of preserved restorer-line head progeny row seeds meeting the requirement for cyclic breeding of restorer-line spike lines, and then planting the res

Abstract: An exhaust gas mixer arrangement for mixing exhaust gases of an internal combustion engine with an additive comprises an exhaust gas flow duct (28) with an inlet area (24) arranged upstream and with a discharge area (26) arranged downstream. The exhaust gas flow duct (28) is bent in a coil-like manner at least in some areas between the inlet area (24) and the discharge area (26).