“MACHINERY : CONTROL AIR REDUCING VALVE TYPE : S-K 414 C-BF2D PARTICULARS : SIZE NAME : 15A-20A REDUCING VALVE MAKER : SANKYO SEISAKUSHO CO. LTD” “PISTON TYPE REDUCING VALVE SHEET NO. RB4F-CF02-J3010” SANKYO SEISAKUSHO.S-K 414 C-BF2D