螺旋装：把书页在装订边打孔，用连续的金属丝作螺纹式穿过的装订方法。参阅机械式装订。

Spiral binding: a method of binding in which a continuous wire is threaded through holes punched in the binding edge of the pages. see mechanical binding.

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螺纹安装孔的位置与电装电机轴线成错开对称分布。

Screw hollow and motor spindle are distributed staggered and equally.

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为了装卡需要，模具上需要有孔，螺纹或者允许不涂层的面。

In order for the tool to be held, there must be holes, a thread or a surface which can remain uncoated.

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