Valvulae late utuntur in saburra, pugna in igne et materia navium et systemata fabricandi.Solebant gas, vapor, slurry, petroleum, etc. Valvulae in fabricando vel navis systemata adhiberi possunt transmittere, prohibere, aptare, moderari fluxum, fluxum vel pressuram accommodare, et pressuram dimittere.Ut...
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