Abstract: The disclosure provides an optical imaging lens assembly, which sequentially includes, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens with refractive power respectively. Each of the fourth lens, the fifth lens and the sixth lens has negative refractive power. A total effective focal length f of the optical imaging lens assembly satisfies f>7.5 mm. A curvature radius R11 of an object-side surface of the sixth lens, a curvature radius R12 of an image-side surface of the sixth lens, a refractive index N6 of the sixth lens and an abbe number V6 of the sixth lens satisfy 1.0 mm?1<V6/(R11+R12×N6)<2.0 mm?1.

Abstract: The present disclosure provides an optical imaging lens assembly. The optical imaging lens assembly includes, sequentially along an optical axis from an object side to an image side: a stop; a first lens, having a refractive power; a second lens, having a refractive power, an object-side surface of the second lens being a concave surface; a third lens, having a positive refractive power; a fourth lens, having a negative refractive power, an object-side surface of the fourth lens being a convex surface; a fifth lens, having a refractive power; and a sixth lens, having a refractive power. A distance TTL from an object-side surface of the first lens to an image plane of the optical imaging lens assembly along the optical axis and half of a diagonal length ImgH of an effective pixel area on the image plane of the optical imaging lens assembly satisfy: TTL/ImgH<1.5.

Abstract: The disclosure provides an optical imaging lens assembly, which sequentially includes, from an object side to an image side along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens and an eighth lens with refractive power respectively. Each of the fourth lens, the fifth lens and the sixth lens has negative refractive power. A total effective focal length f of the optical imaging lens assembly satisfies f>7.5 mm. A curvature radius R11 of an object-side surface of the sixth lens, a curvature radius R12 of an image-side surface of the sixth lens, a refractive index N6 of the sixth lens and an abbe number V6 of the sixth lens satisfy 1.0 mm?1<V6/(R11+R12×N6)<2.0 mm?1.

Abstract: The invention discloses an apparatus for repairing wheel tread with material increase, which comprises a slide rail, a rack, a case, a supporting device, a drive device, a wheel heating device, an ingot blank heating device and an agitation and output device; the rack is fixedly arranged above the slide rail, an upper end of the case is fixedly connected to an upper portion of the rack, the supporting device and drive device are both slidably connected to the slide rail, an output end of the drive device is fixedly connected to the wheels which are positioned below a semicircular notch and are located eccentrically relative to the semicircular notch. The wheel heating device is fixedly arranged below the case, the ingot blank heating device and the agitation and output device are both fixedly arranged in the case, the ingot blank heating device is communicated with the agitation.