压力计

• 厂(rock face; eaves)RADICAL
• 土(earth; soil; ground)ASSOCIATIVE
• 丶(small dot; weight)ASSOCIATIVE

A rock wall pressing down on the earth like a heavy object applying pressure from above.

• 力(strength; muscle)ASSOCIATIVE

The character 力 depicts a flexed arm muscle, symbolizing strength and power.

• 言(word; speech)RADICAL
• 十(ten)PHONETIC

Calculation is using words to count numbers one by one.