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无磁钻具
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无磁钻具
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释
nonmagnetic drilling tool
无磁钻具
采用没有磁性或者弱磁性的合金材料而制作的钻铤、钻杆和扶正器等器械。
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level lifetime
level limiting valve
level line
levelling
levelling agent
levelling instrument
levelling-up
level man car
level manifold
level matching conditions
level measurement of flotation machines
level measuring device
level measuring instrument
level meter
level monitoring device for drilling fluid circulating pool
levelness
level n-structure
level of abstraction
level of a factor
level of a field
level of a function
level of aircraft flying qualities
level of a modular curve
level of an orthogonal array
level of a subgroup
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