Abstract: A system for the measurement of the difference between two fluid flows in two separate ducts using one or more monitoring electrodes or the like arranged in respective ducts is disclosed. The fluid flow in one duct is adapted so that it is capable of being transferred to the other duct. This can be done, for example, using means for the alternate change-over of the fluid flows from their respective ducts to the opposite duct, so that ultimately all the electrodes and/or duct walls are acted upon to a substantially equal extent. Alternatively, this may be achieved using means for conducting one and the same fluid flow through both ducts where the fluid flow difference becomes zero and the measured value can be used as a new zero value for the continued measurement.

Abstract: A method for the manufacture of a deck of adjacently located strips for series-produced decked boats, including the steps of arranging a number of strip members in a parallel relationship, separated from each other by means of intermediately located spacing members, thus giving the strip members a longitudinally extending curved configuration mainly corresponding to the deck line of the boat to which the deck is intended to be attached, thereafter applying a supporting and joining member against the free edge portions of the strip members, and by means of an adhesive, vulcanization, or similar previously known method producing a joint between the strip members and the supporting and joining member, whereafter the spacing members located between the strip shaped members are removed.

Abstract: A method and apparatus for sterilization of a dialysis system. The dialysis system comprises a dialyzer, a receptacle for water and a receptacle for dialysis concentrate, and fluid conducting means for conducting fluids from the receptacles for water and dialysis concentrate to and through the dialyzer. The method includes the steps of terminating the conducting of dialysis concentrate through the fluid conducting means, introducing sterilizing agent into the fluid conducting means at a first point in the fluid conducting means, conducting the sterilizing agent through the fluid conducting means downstream of the first point, and directing a portion of the sterilizing agent from a second point in the fluid conducting means to a third point in the fluid conducting means, the second point being downstream of the first point and the third point being upstream of the first point.