单词	bell signal
释义	bell signal 振铃信号
随便看	hot water plant hot water plants hot water plate hot water pollution hot-water pre-extration hot water prehydrolysis hot-water pressure heating hot water pretreatment hot-water pretreatment Hot-water pretreatment hot water process hot-water process hot water production hot water project hot water pump hot-water pump hot water pump bracket hot-water pump cylinder cover hot-water pump cylinder liner hot water pumping hot-water pump piston hot-water pump piston follower hot water radiation hot water radiator hot-water radiator