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。
2
This paper Outlines a special gauge suitable for measuring the hole positions or distance between two holes in the cylinder blocks.
介绍了一种适用于测量气缸体上各孔位置及任意两孔间距离的专用测量工具。
3
The Toolpusher or Senior Driller shall verify all stabilisers, reamers and bits will be gauged with appropriate ring gauge to ensure proper size before running in the hole.