超市冷冻冷藏
supermarket cold preservation
Supermarket clod
单独回路冷却水
separate circuit cooling water
单独回路冷却系统
separate circuit cooling system
回路冷却管路阀
return coolant line valve
冷冻、冷藏
Cooling and refrigeration
联合回路冷却系统
combined circuit cooling system
水产冷冻冷藏
Aquatic freeze and refrigeration
致冷回路问题
refrigerant circuit problem