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.
Dry and secondary drowning typically occur one to 24 hours after a struggle in the water, so it is easy to miss the signs, especially in young children who may be worn out after a day in the water. Parents are encouraged to watch for the symptoms, especially if the child has had struggles in the water.