出口开口于电机壳体所提供入口孔成流体连接。

The outlet opening fluidly communicates with an inlet aperture provided by the motor housing.

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该冲头包括端部，该端部适于刺穿入口孔并折弯环绕该入口孔的材料，以沿着该入口孔的内缘形成残留的废料。

The punch includes an end portion adapted to Pierce an entry hole and bend material around the entry hole to form a retained slug along an inner edge of the entry hole.

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该冲头具有比零件的截面更大的长度，以便冲头穿过零件的进一步行进在零件内冲压出与入口孔相对的出口孔。

The punch has a length greater than a cross-section of the part such that further advancement of the punch through the part punches an exit hole in the part opposite the entry hole.

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