Respuesta :
I'm not sure of the context, so I will give you a two-4-one
a blockage of the flow in a pump or pipe, caused by an air bubble.
a compartment with controlled pressure and parallel sets of doors, to permit movement between areas at different pressures.
a blockage of the flow in a pump or pipe, caused by an air bubble.
a compartment with controlled pressure and parallel sets of doors, to permit movement between areas at different pressures.
an intermediate chamber with two airtight doors or openings to permit passage between two dissimilar spaces (such as two places of unequal atmospheric pressure)