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出典:Wiktionary
出典:『Wiktionary』 (2025/07/29 02:10 UTC 版)
beam compass (plural beam compasses)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/19 00:16 UTC 版)
A beam compass is a compass with a beam and sliding sockets or cursors for drawing and dividing circles larger than those made by a regular pair of compasses. The instrument can be as a whole, or made on the spot with individual sockets (called trammel points) and any suitable beam.
beam compass