surveyor's leveling pole; leveling rod
Technical term used in surveying and construction. Refers to a graduated rod used with a level to measure height differences.
測量士が準尺を使って地面の高さを測った。
The surveyor measured the ground height using a leveling pole.
Compound of 準 (standard, level) and 尺 (measure, rod). The exact historical derivation is uncertain, but the term is conventionally associated with surveying instruments.