- outer ring
- 外: outside; external side
- 环: ring; hoop
- 定位: fixed position; location; or ...
- 外定位环: outer ring
- 定位环: abutting collar; circlip; distance ring; holding ring; locating ring; register ring; registerring; set hoop; spacer ring
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外环，外定位环的英文
发音:
- outer ring
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