Crown Block Main sheave diameter 19.68 (in) Fastline sheave diameter 24.02 (in)
                                         
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                                            ...frame is made of high strength steel shapes & plates. The lug plate for top drive is provided. The crown block is equipped with metal base plate, handrail, and toeboard. A ladder has an opening. A deviation fast-line sheave. The sheave cluster is titled to...                                         
                                        
                                            XIAN ATO INTERNATIONAL CO.,LTD
                                         
                                        
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