Generally trench cover plastic mould has very good toughness, not easy to deformation, color plump, good thermal stability.

一般沟盖板塑料模具都有非常好的韧性，不易变形，颜色圆润饱满，具有很好的热稳定性。

youdao

In the boiler room trench should have cover board at the ground level.

锅炉房内沟道上应有与地面平齐的盖板。

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Outdoor cable trench are reinforced concrete trench with reinforced concrete cover plate.

室外电缆沟由钢筋混凝土砌成，上面加钢筋混凝土盖板。

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But the Bishnoi, a caste of farmers in Rajasthan, cover their dead in salt and bury them in an unmarked trench.

ECONOMIST: The world��s way of death