Sentence examples for difficult to polish from inspiring English sources

KDP is a common type of optics that is extremely difficult to polish by the conventional route.

Amongst them, vacuum tubes, wave guides and sanitary tubes are difficult to polish by conventional finishing methods such as lapping, because of their shapes.

On the other hand, Sapphire substrates usually have low loss, but they are usually thick (500 μm) and has high hardness so it is very difficult to polish them into different thickness.

The analyses have demonstrated that a single glass window with a thickness of 42 mm would be mechanically acceptable but expensive to manufacture and it would be difficult to polish glass of that size to lens quality.

In addition it was difficult to polish painted textile to the same level of traditional oil paint cross-section because of the presence of the textile fibres tended to be abraded unevenly.

Through experiments, we show that the new process is suitable for polishing three-dimensionally configured workpieces made of very hard materials, such as glassy carbon (GC), that are very difficult to polish using conventional processes.

If not for its softness (Mohs hardness 5, compared with the 7 to 9 of most gems), apatite would be a popular gemstone; much of the material found is clear, but it is fragile and difficult to cut and polish.

Sheen to polish up Clough?

Consider: "Likes to polish totem poles".

Time to polish the shoes.

Wool wheel polishing tool and polishing paste are used to polish the freeform surface part.