The needle of a magnetic compass points to the magnetic North Pole.

磁性罗盘上的指针指向北方磁极。

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Linking method: Connect the electric needle instrument of plus or minus pole respectively on the needle handle, and exchange poles every time.

连接方法：将电针仪的正负极分别接在针柄上，每次将正负极交换连接。

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The central cleaning device makes the powder ascending rate higher, as the diversion conductor and pole needle do not accumulate powder.

中央清理气的设计，使导流体和极针不再积粉，提高了上粉率。

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An anomaly is a simple drawing by Martin Puryear for "Box and Pole, " his first major sculpture (a 52-inch cube next to a 100-foot needle, both carved in wood), installed at Artpark in 1977.

WSJ: Wish You Were Here | Albright-Knox | They Shuffled Off to Buffalo | By Richard B. Woodward