A plurality of recesses are formed on the outer circumference of the magnet; the magnet and the bushing are integrated by one-shot plastic forming, and the bushing is of plastic.
在磁铁的外圆周面上形成多个凹槽，磁铁和衬套一次注塑成型、形成一体，衬套由塑料制成。
The only major difference is that boring jigs are normally fitted with a pilot bushing or bearing to support the outer end of the boring bar during the machining operation.
唯一最重要的差别是镗夹具一般用于控制衬套，或者在机器操作时支撑镗杆的外端。
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