泡罩齿缝长度与宽度

bubble cap grid tray turbine bubble cap plate bubble and squeak cap and feather days cap and gown cap and bells axis of levelling bubble width of tooth width of feet width of grip width of root face width of thread height of bubble cap second leaf width and length outside diameter of bubble cap clearance between bubble cap and tray slot width bubble-cap bubble cap open-slot bubble bubble-cap tray tower bubble cap absorption column bubble-cap tower