Steelyard

[sti:ljɑ:d]

解释:

(noun.) a portable balance consisting of a pivoted bar with arms of unequal length.

整理:莫尼卡--From WordNet

解释:

(n.) A form of balance in which the body to be weighed is suspended from the shorter arm of a lever, which turns on a fulcrum, and a counterpoise is caused to slide upon the longer arm to produce equilibrium, its place upon this arm (which is notched or graduated) indicating the weight; a Roman balance; -- very commonly used also in the plural form, steelyards.

录入:劳伦斯

解释:

n. the Roman balance an instrument for weighing consisting of a lever with unequal arms in using which a single weight or counterpoise is employed being moved along a graduated beam.

校对:佩德罗