What does SV stand for?

Sluice valves, water main pipes, fittings, sewer pipes and fittings etc are offered by McMahons .

At the bottom of the silo there is a rotating sluice valve that guides the product through the vacuum transport without losing any pressure.

clear-cutting the real that cannot be bought and sold using a theme draining our lakes moving our paths our gates do not close like sluice valves of economic desirability we cannot defend the untouched we line the remaining roads with cars parked but not ticketed set up events set up tents set up golf set up Art we cannot let ourselves glimpse deforestation delimited or golf course dreams not contingent on sycamores we drive back down McCausland, another missing median tree unreplaced no one person's beauty another cutting, crew breaking after they've broken watch actions taken in our name set up our particleboard future