For stationary sources, MECA members include manufacturers of selective catalytic reduction (SCR) systems, non-selective catalytic reduction (NSCR) systems, diesel particulate filters, and catalytic oxidation systems.

• 关于固定源，成员为选择性催化还原系统、非选择性催化还原系统制造企业，柴油颗粒过滤器、催化氧化系统生产商等。