1. Equipment for lifting slurry or dry powder through pipes by means of compressed air.
2. The use of compressed air, introduced in water at the bottom of an open-ended cased pile or cell of a cofferdam, to rid it of loose material.
1. Equipment for lifting slurry or dry powder through pipes by means of compressed air.
2. The use of compressed air, introduced in water at the bottom of an open-ended cased pile or cell of a cofferdam, to rid it of loose material.