STRAS77 RTP SLOT The grooves must be in the same direction as the polarizing film. A special polymer that creates microscopic grooves in the surface is rubbed on the side of the glass that does not have the polarizing film on it. A pilot hole creates the vessel for a screw to enter without damaging the surrounding material. The structure of liquid crystals can be changed by electric current. There are transparent substances that can conduct electricity. Liquid crystals can transmit and change polarized light. Light can be polarized. You then add a coating of nematic liquid crystals to one of the filters. When the device is ready, it sends an Endpoint Ready (ERDY) to the host which then reschedules the transaction.|Penggerak Cakram Optik