Falling-object protective structure (FOPS) can block objects (such as trees, rocks) so that it supplies protection for the operator.

落物保护结构是在有坠落物体(如树木、岩石等)时，对司机提供适当保护的安全结构。

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Elder brother and heir, laughed outright, though it was his trees that were falling for trench props.

至于他的长于哈白呢，却公然大笑，虽然砍给战壕里用的树木是他自己的。

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