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It is cheap that R290 has the good and economic.
R290价格低廉，具有良好的经济性。
youdao
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The combustibility of R290 can completely control its safety.
R290的可燃性在实际中是完全可以控制其安全性。
youdao
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The combustibility of R290 can completely control its safety.
R290的可燃性在实际中是完全可以控制其安全性。
youdao