Sickle cell disease symptoms include repeated infections, yellow skin, fatigue, dizziness, pain, and more.
SWB file is a SolidWorks Macro. SolidWorks is a 3D mechanical CAD (computer-aided design) program that runs on Microsoft Windows and was developed by SolidWorks Corporation. SWB files are older-style SolidWorks macro files.
ANSWER: A PVB is a mechanical backflow preventer that consists of an independently acting, spring-loaded check valve and an independently acting, spring-loaded, air inlet valve on the discharge side of the check valve. It includes shutoff valves at each end of the assembly and is eqipped with test cocks.