Abstract: A product packaging includes: a sleeve forming a first opening to an interior; and a product display configured to be contained within the interior when the product packaging is in a closed state, the product display including a lid that is configured to close the first opening in the closed state, and to begin, upon the lid being pulled, extraction of the product display from the sleeve into a presentation state.

Abstract: A method for quantitatively evaluating the anisotropy of joint roughness coefficient of rock joints is provided, comprising the following steps: selecting a joint sample of an engineering rock mass to be analyzed; uniformly arranging rock joint measurement segments in different orientations; recording each joint profile by a profilograph; measuring joint roughness coefficient of each measurement segment; calculating a statistical mean value of the joint roughness coefficients in each orientation under same dimensional conditions, and obtaining a roughness coefficient class ratio in each orientation; transforming each item in the roughness coefficient class ratio by R1(i)=r0(i)1/m; fitting the processed roughness coefficient of the rock joints by anisotropic ellipse function; determining a major axis a and a minor axis b of the anisotropic ellipse, ? representing a direction of rotation, where a ratio of the major axis to the minor axis indicates a difference between the maximum roughness coefficient and the m