[Sekiguchi, Hirayama, Miyo, Ohishi]

On 9th May:
(1) We changed the LVDT combiner from a temporary one to the one prepared by AEL (S1706490).
(2) We connected BF LVDT cables to the combiner and checked signals.
     Three Type-1 cables were broken at the D-sub connector and we fixed them.

*I saw dirty white marks on the top plate though we have covered the whole PR3 during holidays.