空气取样器

• 穴(row; gap)RADICAL
• 工(craftsman; work)PHONETIC

An empty cave with nothing inside is just hollow space.

• 气(vapor; gas; steam)ASSOCIATIVE

The character depicts wisps of vapor rising upward, symbolizing invisible atmospheric air.

• 耳(ear; lobe)ASSOCIATIVE
• 又(right hand)RADICAL

The right hand grasps the enemy's ear — that is how ancients took spoils of war.

• 木(tree; wood)RADICAL
• 羊(goat)PHONETIC

A pattern carved on wood looks like a goat standing upright.