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Canal transit (Bqwct)

Computer viruses ()
Transportation operations (B)
     Related Term (Associative): Management and organization (C)
    Transportation facility operations (Bq)
        Waterway facility operations (Bqw)
            Canal operations (Bqwc)
                Canal transit (Bqwct)
                    Canal lock operations (Bqwctm)
                         Use For: Locking