sand shot
(mathematics) A group of isometries leaving a fixed point.
comparative form of bluff: more bluff
Small cast-iron balls cast in sand.
The launching of a glider by being towed behind a powered aircraft
鋳型を詰める前に、彼女は鋳型の表面仕上げを均一にするために砂型で鋳造された小さな鋳鉄球を選別した。
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