These frequencies are higher than the driving speed of the spreader, therefore the large deformation on the spreader doesn't appear. 因此，本文所研制之电动撒布机不会达到自然频率产生共振现象亦不会在机体上出现重大变形。
spreader英英释义
Noun:
a hand tool for spreading something;
"he used his knife as a spreader"
a mechanical device for scattering something (seed or fertilizer or sand etc.) in all directions
