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kelly box
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KELLY BOX
Kelly box is kelly bar drive head and upper fitting, which is used to joint the drilling bucket or auger. usually, it contains few types : 130x130; 150x150; 200x200 sany type ; and 200x200 bauer type ; 250x250
Feature : 1. kelly box size can be manufactured as per customer demand
- The material is used 35CrMo .
- high strength and special heat treatment .
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