| 单词 | safety valving | 
| 释义 | Definition of safety valving in English:safety valvingnoun ˈseɪftɪ ˌvalvɪŋ 
 Origin1930s. From safety + valving. Compare earlier safety valve. Definition of safety valving in US English:safety valvingnounˈseɪftɪ ˌvalvɪŋ 
 Origin1930s. From safety + valving. Compare earlier safety valve.  | 
	
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