Oil Tricone Drill Head Bits - deruisi (
China ) - Offers to Sell and Export - Friday 18 January 2019 2:53 am - oil tricone drill head bits
parameter of oil drill bits
general date
bit size 14 3 4 quot 374 7mm
iadc code
hjt 437
bearing type
journal bearing
nozzle
3 nos
seal typ...