A.0.2~0.3m B.0.3~0.4m C.0.4~0.5m D.0.5~0.6m
A.0~0.2% B.1%~2% C.0.3%~0.5% D.3%~5%.
A.冷凝壓力損失較大 B.蒸發(fā)壓力損失較大 C.冷凝壓力損失較小 D.蒸發(fā)壓力損失較小。