板片数量

moving plates of variable condenser aberration arising from the use of flat plates damping plates floor plates of no utility region of no pressure have no semblance of take no count of have no lack of take no account of of no value of no avail system of plates number of anode plates preparation of plates number of effective plates plates of unequal thickness number of plates number of theroretical plates thickness of link plates identification of plates theory of plates collection of illustrative plates