plumb bob

ریشه

The term 'plumb bob' combines 'plumb' (referring to the vertical line) and 'bob' (referring to the weight).

مثال

• The construction worker used a plumb bob to ensure the wall was straight.
• The plumb bob swung freely, indicating the vertical alignment.
• The archaeologist used a plumb bob to measure the depth of the excavation.

ترکیب‌های رایج

Use a plumb bob Attach a plumb bob Swing a plumb bob Measure with a plumb bob