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2.2%~71% 2.2%~81% 12%~81%
2.8~93% 2.2~90% 2.8~81% 2.2~93%
2.2%~81% 2.8%~93% 4.65%~93.9% 3.2%~64%
2.8%~83% 2.8%~93% 4.8%~93%
2281% 2.281% 2.28.1% 2.218%
2.2%~81% 2.8%~93% 4.65%~93.9% 3.2%~64%
3%~81% 13%~81% 9%~81% 19%~81%
22~81% 2.2~81% 2.2~8.1% 2.2~18%
4—22%,2.3—81% 2.3—81%,4—22% 4—81%,2.3—22%
与空气形成爆炸性混合物,遇点火源时 __下 在爆炸极限上上限 以上的空气混合物,遇点火源时