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YD-1

YD-1

YD-1

YD-1

1

A quarter circle with a radius of1 m (1 yd ) from each corner flag post is drawn inside the field of play .

在比赛场地内，以距每个角旗杆 1 米（码）半径画一个四分之一圆。

2

Effects of Additive YD-1 on the Microstructure of Ni-Fe Alloy Coating

YD-1 添加剂对镍铁合金镀层微观结构的影响

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