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Line 36: Line 36:  
| Maintenance access || Moderate || Excellent || Moderate || Difficult
 
| Maintenance access || Moderate || Excellent || Moderate || Difficult
 
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|-
| Standard strength || H-20  || H-25 || H-20 || H20-HS25
+
| Standard strength || H-20  || H-25 || H-20 || H-20 to H-25
 
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