beam compass
plural of horse mussel
a device for creating circular curves, which has a central pivot pin, and an outer curb scribing point, connected by a horizontal beam
A male given name
plural of Harold
大工は切断する前に、中心の芯ピンと外側の刻み針が水平な梁でつながれたコンパスを使って材木に正円をけがいた。
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DiQt
Free
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