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质量管理体系 zhìliàng guǎnlǐ tǐxì
agric. quality management system
hydroel.st. quality control system
〔客〕质量管理体系 zhìliàng guǎnlǐ tǐxì
avia. quality management system
质量 管 理体系
: 9 phrases in 2 subjects
Aviation8
Business1