It further proved that triphosgene replacing the deadly phosgene and diphosgene is feasible.
步证明了三光气代替剧毒的光气和双光气可行
。
It further proved that triphosgene replacing the deadly phosgene and diphosgene is feasible.
步证明了三光气代替剧毒的光气和双光气可行。
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