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visual check
agric.	视力检查
auto.	视觉目视检查
avia.	目视检査
commer.	目测检查
nautic., tech.	目视检查外观检查
oil	外观检查
plast.	观察检査
railw.	肉眼检查
space	目视检查
tech.	直观检查; 目视检验; 肉眼检査

visual check : 6 phrases in 2 subjects

Aviation	5
Technology	1