when a cubical particle is needed. when finished product must be well graded and must meet intermediate sizing specifiions, as well as top and bottom specifiions. when ores must be broken along natural cleavage lines in order to free and separate undesirable inclusions (such as mica in feldspars). when materials are too .
Periodic, which is required maintenance as determined by manufacturer's recommendation and/or SLAC policy Maintenance includes replacement or repair of defective or worn components. Maintenance does not include implementing modifiions or alterations. Qualifiions Maintenance must be performed by a qualified mechanic.