gōng / chéng / shī / jiǎn / chá / le / zhī / hù / shè / bèi / yǐ / fáng / zhǐ / xiàng / dào / mào / dǐng

工程师检查了支护设备，以防止巷道冒顶。

The engineer inspected the support equipment to prevent the mine passage roof from caving in.