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| 解痛药; 缓和物〔剂，装置〕; 安慰者 | |||
| 缓和剂 | |||
| 缓和装置; 减轻装置 | |||
| 衰减装置; 阻尼器 | |||
| 缓和物; 缓冲装置; 缓冲器 | |||
| alleviator: 2 phrases in 1 subject |
| Aviation | 2 |
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