Inside lining is made of sheath, front guard board and back guard board, which is made of AFM and rubber cloth.

内衬部分由护套、前护板和后护板组成，它们由耐磨金属或橡胶材料制成。

youdao

The escaped prisoner was brought back under armed guard.

越狱逃犯由武装警卫押回。

《牛津词典》

Here, a guard hands back a flower that has been given to him by those celebrating on the Wall.

这幅图中，一个边防兵将在墙上欢庆者送他的一朵花递回给身后的那些人。

youdao

The guard raced back across the bridge to the railroad station.

VOA: special.2009.06.25

And now we have a guard back here with about 38 percent of the equipment they should have.

NPR: Critics Question Using Nat'l Guard Troops at the Border

When the faux-aristocrat informed them that there was no way he was driving back, the guard pulled out a gun and asked for cigarettes.

WSJ: An Accidental Trip to Trans-Dniester | Traveler's Tale

The Sheriff sent a guard back in to fetch him.

NEWYORKER: Sheriff Joe