A method of boron removal from saline water containing boron and magnesium or calcium salts including a multi-stage reverse-osmosis separation process and comprising the steps of a first stage RO separation at pH<8. In one embodiment, a sleeve is formed integrally with a motor base. A link storage is connected between rails of a first bus and between the first stage and a second stage. The journals and the pockets are both similar in height to the inner width of the lock and each journal has several retaining frames, associated with several retaining grooves in the pocket of the other lock part. The shift in the neutral bending surface causes a significant increase in the elongation range required along an attacking portion of the hydrofoil after the predetermined angle of attack is exceed. The angle formed between a first tapered part of the first drawing die and the axis of the first cavity is greater than the angle formed between a second tapered part of the second drawing die and the axis of the second cavity.