International Organization for Standardization (ISO)
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ISO 3435:1977
Scope
Establishes a classification and symbolization of bulk materials in order to assist communication between manufacturers and users of handling equipment. The object of the classification is to secure from enquirers an accurate description of the material to be handled in respect of any specific project.
ISO 3435:1977 history
1977ISO 3435:1977 Continuous mechanical handling equipment; Classification and symbolization of bulk materials