If you own your home, or even if you rent, chances are high that you’ll need to perform some basic toilet repair at some ...

Abstract: During rocket launch, the swing speed of the umbilical arm is controlled by a speed regulating valve consisting of a large flow rate pressure compensation valve and a variable throttle valve ...

Abstract: A miniature single-piston valve flow-matching water-hydraulic pump is described in this paper, which designs with a unique double-face cam mechanism to achieve the reciprocating motion of ...