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单词 rafter level
释义

Definition of rafter level in English:

rafter level

noun
US historical
  • A levelling instrument consisting of an A-frame made of long spars of wood with a pendulum suspended from the apex, used to ascertain the differences of level in a piece of land.

Origin

Late 18th century; earliest use found in George Washington (1732–1799), revolutionary army officer and president of the United States of America.

Definition of rafter level in US English:

rafter level

noun
US historical
  • A levelling instrument consisting of an A-frame made of long spars of wood with a pendulum suspended from the apex, used to ascertain the differences of level in a piece of land.

Origin

Late 18th century; earliest use found in George Washington (1732–1799), revolutionary army officer and president of the United States of America.

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