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用圆弧连接已知直线和已知圆弧。
Arc connection between one line and another piece of arc .
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部分线是将部分圆弧的两端部连接的线。
The partial line is a line joining the two end portions of the partial arc.
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部分线是将部分圆弧的两端部连接的线。
The partial line is a line joining the two end portions of the partial arc.
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