钻井泥浆泵属于往复泵的一种,在钻井作业中应用广泛,主要用来输送泥浆或者水等冲洗液。由于钻井泥浆泵长期受大载荷扭矩、泥浆液高......

Ni-TiN nanocomposite coatings were prepared by ultrasonic electrodeposition, and the effects of the surfactants on the c......