英文: BRICKWORK_STRUCTURES_DESC;Vaults and cylindrical structures used in medieval churches needed this technique of bricklaying to form its structures without angularity
中文: 中世纪不带棱角的拱顶和圆柱建筑需要这种砌砖技术. 更详细...
英文: In general, smaller grain size and greater angularity
tend to increase the porosity while an increase in range of particle size tends to decrease porosity.
中文: 通常，颗粒越小曲率越大孔隙度越大，而当颗粒尺寸增大时孔隙度会减小。 更详细...
英文: The striated marks on the curve part of magazine are the marks formed by the friction between shell cases and the inner angularity
of magazine's curve part during the process of bullet installation.
中文: 摘要弹匣弧形部擦划痕迹是射手在以压推方式向弹匣内压装枪弹过程中，弹壳体与弹匣弧形部内边棱相摩擦而形成的痕迹。 更详细...