For the oil level gauge, observation hole and the best use of natural materials, glass or polyamide materials.

用于油位计、观察孔等的材料，好使用天然玻璃或聚酰胺材料。

youdao

For the oil level gauge, observation hole and the best use of natural materials, glass or polyamide materials.

用于油位计、观察孔等的材料，好使用天然玻璃或聚酰胺材料。

youdao