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段数 duànshù
met.	number of stages
telecom.	hop count
段数电雷管的段数因生产厂家和雷管系列而不同。毫秒电雷管的段别,可用雷管脚线颜色和标牌区分,但是不同的制造厂家，所采用的颜色也不同。我国毫秒电雷管的最高段数为30段，通常25ms 等间隔的为20段 duànshù
expl.	number of delays
集装箱段层数
econ.	tier number

段数: 155 phrases in 28 subjects

Advertising	2
Agriculture	1
Air defense	2
Architecture	1
Artificial intelligence	1
Business	4
China	1
Communications	2
Construction	1
Earth sciences	2
Electronics	20
Explosives and Explosive Ordnance Disposal	2
General	3
Geophysics	2
Germany	1
Information technology	14
Librarianship	2
Mining	1
Multimedia	1
Nuclear physics	2
Oil / petroleum	2
Polymers	2
Project management	4
Rail transport	3
Space	15
Technology	44
Telecommunications	19
United Nations	1