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ISO 5721:1989
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ISO 5721:1989 Tractors for agriculture -- Operator's field of vision
standard by International Organization for Standardization, 10/01/1989
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Full Description
This second edition cancels and replaces the first edition (1981). Specifies practical and mathematical methods of determining the masking effects of obstruction on the angles of vision forward, to the rear and upwards of seated operators of tractors. It does not take account of detachable implements and mounted elements, for example front loaders, pallets, ect.