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安全工作区 ānquán gōngzuòqū
busin.	safety operating area
el.	safe-operating area; safety working area
oil	clear working place
space	safety operation area
tech.	safe working area
wind.	area of safe operation; safe operating area
安全施工工作区
archit.	area of safe operation

安全工作区: 4 phrases in 2 subjects

Electronics	3
United Nations	1