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.
Drownings are seen more commonly in rural areas and in the southern and western United States (62%).In California, Arizona, and Florida, drowning is the number one cause of injury-related death. Morbidity from submersion occurs in 12-27% of survivors aged 1-14 years.