Again, defrost heater can be inhibited in the surface temperature of a flammable refrigerant temperature below the ignition.
再有，可将除霜加热器的表面温度抑制在可燃性制冷剂的发火温度以下。
In the early days of mechanical refrigeration, flammable chemicals such as ammonia were used as refrigerant.
在早期的机械制冷，易燃的化学物质如氨作为制冷剂。
In the early days of mechanical refrigeration, flammable chemicals such as ammonia were used as refrigerant.
在早期的机械制冷，易燃的化学物质如氨作为制冷剂。
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