Electrical circuits are protected against overheating by means of a/an ().
- Acircuit breaker
- Bamplifier
- Cdiode
- Dcapacitor
Electrical circuits are protected against overheating by means of a/an ().
SELV回路(SELV circuit)
一回路 primary circuit
3、() are mounted in pairs to protect the
() are mounted in pairs to protect the boiler against overpressure.ASafety valvesBWater tubesCSteam stop valvesDBlow down valve
4、二回路 secondary coolant circuit
二回路 secondary coolant circuit
SELV回路(SELV circuit)
VC(Virtual Circuit)虚电路