Test shows that the bit grease prepared with non --soap thickeners (heat -resistant bentonite or polyvinyltetrafluoride)can offer highe...

• 试验表明,用非皂基稠化剂(耐热膨润土或聚四氟乙烯)调制的钻头润滑脂具有较高的极压抗磨性和耐热性。