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for subject
Drilling
containing
弹回
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all forms
Chinese
English
回位弹簧
trip spring
回弹冲击
impact of recoil
回闭弹簧
closing spring
弹力止回阀
spring-loaded check valve
扭转回弹
torsional resilience
突然回弹
snapback
钻杆扣卸开时回弹
snapping back
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