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(window.slotbydup=window.slotbydup || []).push({
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氧气的用途 (1)供给呼吸：医疗上急救病人，登山、潜水、航空、宇航提供呼吸; (2)支持燃烧：炼钢、气焊与气接、液氧炸弹、火箭助燃剂 (责任编辑：admin) |