A、輸入元件 B、輸出元件 C、檢測(cè)機(jī)構(gòu)
A、溢流閥 B、截止閥 C、節(jié)流閥 D、減壓閥
A.絕對(duì)壓力和相對(duì)壓力的差值B.當(dāng)絕對(duì)壓力低于大氣壓時(shí),此絕對(duì)壓力就是真空度C.當(dāng)絕對(duì)壓力低于大氣壓時(shí),此絕對(duì)壓力與大氣壓的差值D.大氣壓力與相對(duì)壓力差值