flat grain造句

Anisotropic alloys, where extrusion or heavy working leads to formation of long, flat grains, are especially prone to intergranular corrosion.
The flat grain fields towards Le Mesnil-Patry had not been occupied and there had been no sign of a German withdrawal.
Small family farmers are being driven out by flat grain prices, kept artificially low in part by government subsidies that encourage overproduction.
It's difficult to find flat grain in a sentence. 用flat grain造句挺难的