A.電空閥 B.電磁閥 C.卸荷閥 D.安全閥
A.DC20~28V B.DC20~30V C.DC20~26V D.DC18~28V
A.大于等于DC1.5V B.大于DC1.5V C.大于等于DC1.3V D.大于DC1.3V