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防弹门
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防弹门
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bullet-proof door
防弹门
能吸收和耗散弹头、破片的动能,阻止弹头、破片穿透,有效保护门内人员、物资安全,并符合一定的防弹安全级别的门。
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unitary symplectic group
unitary transformation
unitary transformation group
unitary trick
unitary unimodular group
unitary vector space
unit ausiliary transformer
unit automatic start-up and shut-down control
unit ball
unit basis
unit bore system
unit boundary
unit box
unit brightness
unit cell
unit cell having maximum symmetry and minimum size
unit character
unit charge
unit chemical dosing system
unit circle
unit class
unit combination instrument
unit commitment
unit complex hyperball
unit complex number
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