A support for an oarlock projecting from the side of a racing shell.

一个用来托着宝石保持它金属板（如在戒指钻石或其他首饰也有）。

He hammered out the dents in the metal sheet.

他把金属板一些痕敲掉了。

The metal plates used in making ships used to be riveted together, but now they are usually welded.

造船中使用金属板过去使用铆接, 现在则常用焊接。