Screw clamps. Screw clamps are types which use a screw mechanism to adjust the jaws and clamp a workpiece in place. The types which are found in the screw clamp category include G clamps (also known as C clamps), F clamps, edging clamps, wooden hand screw clamps and rack clamps.
Dry drowning usually happens soon after exiting the water, but with secondary drowning, there can be a delay of up to 24 hours before the person shows signs of distress. Both can cause trouble breathing and, in worst-case scenarios, death.
Over 20 respirations per minute could be a red flag for dry drowning. Check for persistent cough, pain in chest and mood or mental status change. Lethargy or increased agitation when lying flat, sweaty skin or color changes such as pale, or blue/grayish color are signs of poorly oxygenated blood.