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period of half change
半变期
period of half change
period of heating
period of immaturity
period of insurance
period of isometirc r...
period of isometric c...
period Of isometric r...
period of key
period of lease
period of light varia...
period of limitation
period of line
period of load develo...
period of loading
period of management
period of motion
period of notice
period of operating c...
period of optical cycle
period of oscillation
period of permutation
period of pregnancy
period of priority
period of probation
period of punishment
period of quoalfying ...
period of recovery
period of recurring c...
period of redemption
period of registration
period of relaxation
period of renewal
period of reservior w...
period of responsibility
period of retention
period of revolution
period of S.H.M.
period of sampling
period of satellite
period of saturation
period of schooling
period of service
period of slack sales
period of slow-wave s...
period of state
period of stay
period of stipulatad ...
period of storage
period of tillage
period of time
period of transformation
period of transition
period of uncovering
period of use
period of validity
period of variable star
period of vibration
period of vigorous ec...
period of wave
period of waves
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