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2. Suction cup - Wikipedia

   en.wikipedia.org/wiki/Suction_cup

   The working face of the suction cup is made of elastic, flexible material and has a curved surface. [3] When the center of the suction cup is pressed against a flat, non-porous surface, the volume of the space between the suction cup and the flat surface is reduced, which causes the air or water between the cup and the surface to be expelled past the rim of the circular cup.

3. Suction caisson - Wikipedia

   en.wikipedia.org/wiki/Suction_caisson

   The height of the Diana suction caissons is 30 metres, their diameter 6.5 metres, and they were installed at a depth of about 1500 m on soft clay deposits. Since then, suction caissons have been installed at even larger depths, but the Diana installation was a technology breakthrough for the 20th century.

4. Self-sealing suction cup - Wikipedia

   en.wikipedia.org/wiki/Self-sealing_suction_cup

   The self-sealing suction cup is a suction cup that exerts a suction force only when it is in physical contact with an object. Unlike most other suction cups, it does not exert any suction force when it is not in contact with an object. [1] Its grasping ability is achieved entirely through passive means without the use of sensors, valves, or ...

5. Precast concrete lifting anchor system - Wikipedia

   en.wikipedia.org/wiki/Precast_concrete_lifting...

   Suction due to casting bed adhesion is not considered, as the calculation takes into account the lifting device dynamic coefficient. S = (W x Ksl x Kd) / n = (64.8 x 1.16 x 1.2) / 2 = 45.1 kN load resistance required per anchor; Anchor capacity for site lift F/n = 23 kN per anchor during site lifting (n = 2 lifting anchors)

6. Net positive suction head - Wikipedia

   en.wikipedia.org/wiki/Net_positive_suction_head

   If an NPSH A is say 10 bar then the pump you are using will deliver exactly 10 bar more over the entire operational curve of a pump than its listed operational curve. Example: A pump with a max. pressure head of 8 bar (80 metres) will actually run at 18 bar if the NPSH A is 10 bar. i.e.: 8 bar (pump curve) plus 10 bar NPSH A = 18 bar.

7. Grab bar - Wikipedia

   en.wikipedia.org/wiki/Grab_bar

   ADA-style grab bars and their mounting devices should withstand more than 250 pounds (1112 N) of force. In public toilet stalls, side grab bars must be a minimum of 42 inches long and mounted 12 inches from the rear wall, and rear grab bars must be a minimum of 36 inches long and mounted a maximum of 6 inches from the side wall.