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2. Hold down (structural engineering) - Wikipedia

   en.wikipedia.org/wiki/Hold_down_(structural...

   A hold down resisting uplift from a timber shear wall. Holdown (holdown, hold-down, or hold down) or tie-down in structural engineering refers to the steel device or hardware that is installed at the end of a plywood shear wall. The hold downs provide uplift resistance against the overturning moment imposed on the wall due to "in-plane" lateral ...

3. Autonomous spaceport drone ship - Wikipedia

   en.wikipedia.org/wiki/Autonomous_spaceport_drone...

   The first stage is secured to the deck of the drone ship with steel hold-downs welded on to the feet of the landing legs. [62] In June 2017, OCISLY started being deployed with a robot that drives under the rocket and grabs onto the hold-down clamps located on the outside of the Falcon 9's structure after landing. [63]

4. Holdfast (tool) - Wikipedia

   en.wikipedia.org/wiki/Holdfast_(tool)

   A holdfast or hold fast is a form of temporary clamp used to hold a workpiece firmly to the top or side of a wooden workbench or the top of an anvil. [1] A form of bench dog, a traditional holdfast has either a curved or flat top. Its shank is slid loosely into a “dog” hole in the bench or anvil until the tip of its hook touches the work.

5. Anchor - Wikipedia

   en.wikipedia.org/wiki/Anchor

   Holding ground is the area of sea floor that holds an anchor, and thus the attached ship or boat. [4] Different types of anchor are designed to hold in different types of holding ground. [5] Some bottom materials hold better than others; for instance, hard sand holds well, shell holds poorly. [6] Holding ground may be fouled with obstacles. [6]

6. Chuck (engineering) - Wikipedia

   en.wikipedia.org/wiki/Chuck_(engineering)

   A chuck is a specialized type of clamp used to hold an object with radial symmetry, especially a cylinder. In a drill, a mill and a transmission, a chuck holds the rotating tool; in a lathe, it holds the rotating workpiece. [1] Chucks commonly use jaws to hold the tool or workpiece.

7. Hyperbaric evacuation and rescue - Wikipedia

   en.wikipedia.org/wiki/Hyperbaric_evacuation_and...

   If launching is to be done by a crane there should be a backup crane available. Gas systems and normal power supply to the evacuation unit must be easily and quickly detachable, and holding down equipment suitable for quick release. The launch mechanism or an alternative should be able to recover the unit for reconnection to the diving system ...