A filtration centrifuge according to a typical embodiment of the present invention includes a housing canister, a rotor assembly, a rotor shaft, a top cap, and a bottom cap. The invention also provides fabrics and fabric laminates containing the multicomponent fibers, and articles containing the fabric. The rigid circuit board includes a first rigid printed circuit board layer, a second rigid printed circuit board layer, and a flex circuit layer. The first piston is coupled to the armature and the second piston is coupled to a valve. The signal management control unit 471 includes a signal stop detection circuit 48 serving as a signal detection means for detecting a stop of the detected signal and a sequence processing circuit 51 consisting of a signal delay circuit 49 and a logic circuit 50. Methods for preventing clinical and sub-clinical acidosis in ruminants with the acid-neutralizing salts and feed compositions to which the acid-neutralizing salts have been added are also disclosed.