Щебень и гравий из плотных горных пород的翻译：Crushed stone and gravel from tight rocks 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Crushed stone and gravel from dense rock

Crushed stone and gravel from tight rocks

Crushed stone and gravel from the dense rocks

sheb and gravel from dense rocks

Crushed stone and gravel from tight rocks