dynamic effective diameter
effective diameter of bolt or high-strength bolt
effective diameter of thread
effective diameter parameter of the cation
effective diameter， d10
mean effective diameter
effective lowest particle size of effective separation
the equal effective method (2nd equal effective conver-sion)
ratio of diameter of labyrinth passage to diameter of particle
(+)Effective efficiency
(mean) effective mavelength
A effective suspending apparatus
Absorber effective thickness