办公椅下面的小轮子让移动变得很方便。

The ___casters under the office chair make it easy to move around.

这件大衣的帽子是用优质蓖麻羊毛制成的。

The hat of this coat is made from high-quality ___castor wool.

奶奶用撒粉器在派上均匀地撒了些肉桂粉。

Grandma sprinkled cinnamon evenly on the pie using a ___caster.