英语词汇“wall opening”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	wall opening
释义	wall opening wall opening According to OSHA: an opening at least 30 in. (76.2 cm) high and 18 in. (45.8 cm) wide, in any wall or partition, through which persons may fall, such as a chute opening.
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