| 摘要 |
<p>The target has a sight mark and a flat support of materials allowing bullet penetration. The support consists of a fairly thin, rigid, plate and a synthetic material. The latter is expanded or cellular type material between two sheets of paper or cardboard, stuck on the faces. One sheet has the sight mark and the sheets are easily penetrated by bullets so that the hole made by each corresponds to its diameter. This helps umpiring and the passage of check gauges. The sight mark is printed on a paper sheet.</p> |
