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A pulse of longitudinal vibrations is produced by an electro-acoustical transducer held in contact with one surface of the concrete under test
and suppliers in providing quality optical fibres or cables
Safety related minimum requirements for the training of recreational scuba divers
specification on tensile strength
Financial services. Requirements for message authentication using symmetric techniques Ingestion-build-279162 A pulse of longitudinal vibrations1 Scope This International Standard specifies procedures, independent of the transmission process, for protecting the integrity of transmitted banking messages and for verifying that a message has originated from an authorized source. A list of block ciphers approved for the calculation of a message authentication code (MAC) is also provided. The authentication methods it defines are applicable to messages formatted and transmitted both as coded
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