US5299841A - Safety flow restrictor for expansion joints ...
US5299841A US08/018,855 US1885593A US5299841A US 5299841 A US5299841 A US 5299841A US 1885593 A US1885593 A US 1885593A US 5299841 A US5299841 A US 5299841A Authority US United States Prior art keywords conduit housing conduits ring expansion joint Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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