Unverified85% confidenceDecision RuleTime unknown
乳胶气球厚度选择：加厚型（≥3.2g/个）适合氦气飘空使用，可维持12-24小时不掉落；普通型（2.2-2.8g/个）仅适合吹气装饰，充氦气后2-4小时即下坠
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