英
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美
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under-reaming的用法和樣例：
例句
- One technique is to use power reaming to penetrate the first cortex and then switch to hand reaming.
可以用電鉆突破第一層皮質，然后換成手搖鉆擴孔。
- The effects of water jet parameters and drill motion parameters on the soil reaming were investigated by an indoor test.
通過實驗，研究了射流參數和鉆桿運動參數對擴孔效果的影響。
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