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手摇钻
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土钻--手摇钻--螺旋钻--麻花钻
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on boarding
on boarding training
on-board maintenance system
on-board medical monitoring instrument
on board notation
on board notation
on-board oxygen generation
on-board oxygen generation--on-board oxygen generation（OBOG）
on-board oxygen generation（OBOG）
on board processing
onboard radar
on-board telemetering instrument
on-board tracking and safety control system
on-bottom culture
on-bound traffic
On Buddhist Commandments
on buyer's account
on calendar day basis
on calendar-year basis
on call
on-call mission
on-call pay
on-call time
on camera
on camera
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更新时间：2025/2/6 10:52:05