Grades classification

Rolling element bearings are available in either commercial- or precision-grade classifications. 

The filtered air supply for clean and aseptic areas is designed to provide a manufacturing environment which meets the required grade classifications. Particular attention is paid to the protection of the zone of greatest risk, that is, the immediate environment to which the product and the treated components are exposed. 

Graded classification of mine environment geological problems... 

How to treat these mine environment geological problems, on the promise of protecting mine environment and accelerating mine development, is an urgent task. Therefore, the graded classification, which is a useful attempt to meet the requirement of mine geology environment treatment, is put forward. 

Based on a retrospective study of 250 consecutive patients treated by radiotherapy, the classification of Nataf et al. (1998) was established to evaluate individually the risk of hemorrhage. Five angiographic parameters were considered to be determinants of the bleeding risk, leading to a four-grade classification ... 

The symptoms of claudication is a result of LEAD confirmed by ABIs or duplex scanning can be classified on a scale of I-IV, a grading classification of the Canadian Heart Association that parallels that of angina pectoris. 

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