Oil level sight glass 油标 ; 玻璃油位表 ; 油位视镜 ; 油位观察窗
oil level gauge glass 玻璃油位表 ; 油位表玻璃
oil level gage glass 油位表玻璃 ; 玻璃油位表
inspection glass for oil level 油位观察镜
Flat glass oil level gauges 平面玻璃油位表
The inspection glass for oil level of main generator engine governor, to be renewed.
主发电机调速器用于检查油等级的检查玻璃需要换新。
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。
The cooling oil level, and the recommended levels shall be clearly visible during normal operation of the rectifier via the external sight glass.
冷却油水平，建议水平应在正常清晰可见操作通过外部视镜整流器。
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