The results show that the protective atmosphere of air containing 0.1% HFC-32 has a fairly good protective effect.
结果表明：含0.1%体积浓度的HFC-32保护气体可以较好地起到保护作用；
The results show that the protective atmosphere of air containing 0.1% HFC-32 has a fairly good protective effect.
结果表明：含0.1%体积浓度的HFC-32保护气体可以较好地起到保护作用；
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