A blood flow reversal valve useful in hemodialysis having rotational detent features enabling audible and tactile feedback to a clinician and alignment features such as visible indicators associated with the blood lines on either side of the valve to confirm normal or reverse flow.

 
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< Polarization light splitting film, backlight system and liquid crystal display having particular diffusion layer under optical rotational selection layer

> In-band negotiation in single transcompression scenarios related applications

> TWEAK receptor

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