wooden lead working tool used to draft lead waste pipe in the same manner as drift plug; also employed in bending lead pipe without bending spring or sand.
the passively floating or weakly swimming animal and plant life in a body of water.
1. a hollow within a mass, or in a surface. 2. hollowed or rounded inward. 3. the inner face of a bowl.
1. arched up, bulging out. 2. the outer face of a bowl.
a tool to hold adjustable dies that are used for cutting threads on more than one size of pipe or rod, as opposed to a fixed die stock which is only used for one size pipe or rod.
a small cock, faucet or valve, set in a water pipe, pump, drain outlet, end of a cylinder, in a radiator or water jacket and used to drain water, steam or air.
in water and sewage treatment, the elimination, or reduction, of odors and/or algea by aeration, super-chlorinatio, activated carbon treatment, or other processes.