The Schroeder D-AB-2 and D-AB-4 desiccant filter breathers feature a dual filtration process, removing water as well as solid contaminants (2 and 4 micron absolute), respectively.

• 该施罗德的D-AB-2和D-AB-4干燥剂过滤器呼吸功能的双重过滤过程，去除水以及固体污染物（2和4微米的绝对），个别的。