Fun and Laugh
Tuesday, March 21, 2017
点燃冰下甲烷很危险！
点燃冰下甲烷很危险！据说是微生物消化残渣后生产的甲烷，但因为环境寒冷，被冰封住了，但如果正巧在上面开一个洞，还敢点火，大概眉毛会不保~
finned tube
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