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质量下降
zhìliàng xiàjiàng
avia.
mass decrease
;
mass drop-off
oil
quality reduction
telecom.
impairment
质 量 下降:
8 phrases
in 6 subjects
Commerce
1
Electronics
3
Explosives and Explosive Ordnance Disposal
1
Finances
1
Information technology
1
Technology
1
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