1. A jet of air and water mixed, which leaves a nozzle at high velocity; used in cleaning the surfaces of concrete or rock.
2. In cleaning concrete or rock surfaces, a high-velocity jet consisting of a mixture of air and water.
1. A jet of air and water mixed, which leaves a nozzle at high velocity; used in cleaning the surfaces of concrete or rock.
2. In cleaning concrete or rock surfaces, a high-velocity jet consisting of a mixture of air and water.