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became the origin of the army signal corps. using various positions of the flag to represent letters of the alphabet, soldiers would wave them to send messages to other units. union and confederate soldiers became proficient in the myers' system, known as wigwag. soldiers had to be in an elevated location...
finding procedures. because of the large roller dimensions the flywheel is not necessary, and there is therefore now nothing protruding above floor level. it is possible to build in a retarder in the middle of the unit, which is prepared for this addition. if necessary, it is therefore possible to split...