JKB-C-RE1 bus controller; JKB-RL1 long-distance linkage; JKB-RT01 repeater; JKB-C-RC2 bus controller; JKB-C-RC1 bus controller; JKB-C-OC2 controller; JKB-C-OC2 controller; valve control panel; JKB- pc H power supply utation; ventilator control panel; gas leakage alertor; DPR pressure regulating station with gas centralized monitoring system; I- monitoring software; Deng