When climatic conditions are expected to result in operational problems due to cold temperatures, the filters may be covered for protection against freezing;
(climatic conditions; are expected; ) (climatic conditions; to result; in operational problems due to cold temperatures) (the filters; may be covered; for protection against freezing; T:When climatic conditions are expected to result in operational problems due to cold temperatures)
climatic conditions climatic conditions the filters
are expected to result may be covered
in operational problems due to cold temperatures
for protection against freezing T:When climatic conditions are expected to result in operational problems due to cold temperatures